I'd argue being a fanatic is the danger, not religion.
Getting so invested in something whether it's Nazi-ism or a twisted religion, it has more to do with the investment that's dangerous.
Religion is just a popular thing to be a fanatic about.
If religion never existed in the form we know today, I would guarantee people would still be fanatics about some twisted thing instead. Nazi-ism for example, might be just as prevalant should there have never been religion.
Religion encourages fanatical behavior, and I don't know how you could rationalize the sex abuse atrocity within the Catholic Church that got swept under the expensive rug with fanaticism. That seems to me to be the byproduct of, surprise, an antiquated naive doctrine that slanders the human body and the sexual process as "dirty" and "sinful". This also of course has the further knock on effect of demonizing women.
Here is a fine example: Ancient Greece and Rome, before the times of Christianity, sexuality was arguably more liberal than it is today. People having sex in public baths and in front of one another, with antiquities themed around sexual themes like giant penises. They had paintings on their walls of people fucking for everyone to see and nobody cared, it was a normal part of life. You don't even have to look up an unheard of macro society to find it. Just look up Pompeii. Yes, that Pompeii.
On the flipside, you have the Middle East, where even something that happens in secrecy (read: privacy) like adultery can have you stoned to death. Another surprise, it's very likely to be a woman. Claim to be the son of god and develop a massive (threatening) following? Get nailed to a cross and kick off 2000 years of hatred, bloodshed and ruin.
It's all about perspective, and mine is that the Middle East is a particular hot spot for a very specific reason. You have 3 different doctrines fighting over the one piece of sand. Jerusalem has been destroyed twice and besieged 23 times throughout its history. Does that sound normal to you? Or extraordinary? Because it seems very much like the latter to me.