Unfortunately a lot of atheists just decided they knew everything once they realised that the Bible wasn't the literal truth. Many Christians wouldn't claim that and Atheists tend to point at the likes of Ken Ham to strawman the rest of the Christianity.
However I do appreciate Christianity in Europe is very different than it is in the USA.
One of the benefits of religion as I see it is an establishment of a morality that rises above "that which is popular in the moment." Most people are too busy dealing with the minutiae of day-to-day living to sit back and ponder the philosophy of morality, and while some religions may hold unpalatable beliefs they at least have the virtue of being predictable as opposed to the temporary vagaries of the mob.