As we all know, Christianity is the biggest religion in the world but It’s influence over the world, especially to the West, is often overlooked and/or dismissed.
Most important, is how It affected Science and Culture, but it’s also important to consider its ideological tendencies and how it shaped the behavior of the European people:
Science has always been a tricky subject in every religion. However, Christianity is the biggest culprit of “Scientific Bigotry”, which is Its historical rejection of Science and similar subjects, often deemed blasphemous; more than once an Inquisition has been created, with different purposes, but still having in common the punishment of anything deemed inappropriate by the religious figure of the time.
This is evident throughout all of Its history, although the most known examples are Galileo Galilei’s trial and the Condemnations of 1210 to 1277.

Galileo’s Trial

The Condemnations of 1210 to 1277

The Church, though, didn’t do this for enjoyment: it did so because it needed to keep itself intact. During most of the West’s history, especially during the Middle Ages, the Church has been the most prominent factor in deciding a politics, in electing heirs and even wars, such as in the case of the French Wars of Religion. Even thinking about the individual, Church was essential in their day to day life.
As such, even a small change, such as a conflicting discovery, which would disprove the Bible, would be a threat to the modus operandi of society. This becomes especially evident after the Protestant Revolution, also called the Protestant schism, which reminded the Church that it didn’t hold complete control over the population. After this the Inquisitions got more intense, to prevent a further weakening.
However, as has been stated above, every religion has a problem with accepting science. A good example of this is the burning of the Library of Rayy, by Sultan Mahmud of Ghazni, which was burned to the ground because it was thought to contain heretical knowledge. It is thought in Western countries that the Christian Church, especially the Catholic sub-division, is guilty more often of this crime. This isn’t true, looking at the statistics, but it isn’t false either. One must understand 2 things first and foremost: that Christianity is based in Europe and that it is still a 2000-year-old religion.
Christianity being based in Europe might not sound like a convincing excuse to justify the persecution of scientific scholars, but it is important to understand that Europe has been, for most of history, the center of innovation. As such, remembering all the points stated above, one must realize that to preserve its teaching intact persecution was necessary. The second point is pretty self-explanatory: being a 2000 year old religion, It is still a product of its times. It has committed many atrocities throughout Its history, and it is important to realize the amount of progress It has made over the course of Its history, something which many religions didn’t do; Islam is the perfect example: It is a religion which barely changed Its beliefs despite the passing of time, and as such results “bigoted” and, more appropriately, unnecessarily extreme.
Still remaining in theme of positive strives the Church has accomplished, an honorable mention must be given to the Scribe Monks of the Middle Ages: operating during a dark (even though this is still debatable, as significant progress was still happening) period of time, they preserved almost all of Europe’s scientific knowledge, and as a result shaped the Renaissance to such a degree, that without them it could have never existed, or at least would have been delayed by more than 150 years. There are also modern Christian scholars, as the Church has become more progressive over the course of the 20th century; some of the more prominent and well-known ones are Lord Kelvin, J.J. Thompson and Guglielmo Marconi.

Lord Kelvin

J.J. Thompson

Guglielmo Marconi

Even more important is the effect of the Christian religions on culture.
A good way to show how much of a difference in work ethic there is between a French, a German and an Italian: the German works the hardest, as is dictated by protestant work ethic; the French works less than the German, has it is partially influenced by Catholicism and Protestantism; finally, the Italians works the least, as he has close to no Protestant influence. This is also true the other way around: Catholicism promotes “community” love, meaning that it promotes a united community, meanwhile Protestantism promotes individuality.
However, Christianity as a whole has what has been considered a positive thing for most of It’s existence, but which has been turned against Itself in recent years: It’s acceptance of different people. It is good as a concept, as it promotes unity and acceptance, but with the recent shift in migration channels has seriously threatened It’s existence.
For most of history, migrations have only happened between 2 or 3 nations. A person would migrate from Country A to country B, and maybe Country C, but never further than that. As such, countries with similar culture would receive immigrants with similar beliefs, and extremely different cultures would never meet. Being almost entirely white, immigration within Europe remained somewhat homogeneous and civilized.
In recent years, however, immigration became prevalently Muslim and with a completely different culture. This results in a big problem: the Church is welcoming the same people which will try, or succeed, in destroying It. This acceptance of what can only be deemed dangers to society as a whole is causing a general discomfort, and even a departure en masse.
One can understand that the Church isn’t ready to address such a sudden change in religious orientation, but it should come to no one as a surprise that Catholics in particular are becoming more and more radical and nationalistic.

Muslim population of each major country

Finally, we have to address the Ideological Bias of Christianity. Based on the above-stated arguments, such as their stance on immigration, we can safely say that Christianity is oriented naturally towards some form of Socialism, most prominently Democratic Socialism. It promotes charity and sharing of wealth, acceptance of everyone and help for everyone. Except for their more “radical” beliefs, such as their hate of the LGBT community, Christianity naturally promotes socialism.
This is a problem both for Nationalism and for Itself: by promoting Socialism, It also gives an “easier” access to Communism, which, ironically, rejects Christianity.

Overall, we can see a clear meaning behind all of this:
Christianity has been a pillar of European culture for a long time but, despite Its good intentions, It has no place in current society. It needs either a radicalization or It needs to be abandoned.