A thousand years ago is being extra charitable. It got gradually better at a snail's pace with the rise of the Enlightenment and took quite awhile in the West to be sufficiently overcome, even until recent times and is still not perfect (Northern Ireland, the former Yugoslavia region, etc). And that's only on the mega-violence part. Many Christians used the Bible to justify slavery, keeping women like male chattel, etc, for a very long time (heck, women only got the right to vote in the last century in the US). As for violence against Jews, religious hates worked in tandem with social hates that contributed to the Holocaust (not just Germans but also those that collaborated with it, chose to let it happen, etc). Some Christians outside the West can still be fanatically violent such as in Africa, e.g. the Ugandan "kill the gays" bill or being equally up for fights with Muslims, etc, and there are still the types who use Christianity to hate gays or be troglodytes on other issues. That said, the Muslim world needs more progress in this aspect to catch up to where the West has gotten. Some progress is being made, but as one can tell, it can take a very long time with a very bumpy ride just like it did in the West.