The Nazis thought they were the chosen and exterminating the jews was just doing gods work.
In the americas the genocide of the natives was also out destiny as ordained by god.

They're all terrible.

There is no worse--they all have positives and negatives. We need to learn to respect our differences and quit trying to draw lines in the sand

I will say Christianity. Remember that Catholics and Protestants were still killing each other in Northern Ireland in the 1970s.

I appreciate that we are all different and try hard to live and let live. I also, as a very mature person, try to live as good a life as I can and respect/help my fellow citizens BUT it is sometimes difficult! First brought up in the Catholic religion (via advice from a strict pair of paternal grandparents), then - due to WW2 - introduced to strict Chapel influences, I became a confused teenager. However, I have always been a thinker and curious about everything - disliking the 'sheep' concept -I started asking more questions.Oh, how disappointing...for I received, either NO answers.(Islam, where one does not ask questions AT ALL?!) And from the Catholic quarter, I was TOLD WHAT TO BELIEVE, and quickly realized it was a religion of fear
and subjugation. (You are even told what books NOT to read..) Being idealistic,at 18 I became a follower of the Jewish faith and married a good Jewish man. Now, decades later, we are both Humanists, while still respectful of the Jewish faith. Praying is a little like going to the Casino!

Isn't tht kind of like asking which form of slow torture is better?

There all the same

Right now it has to be Islam. No doubt about it

Not a fair comparison. Christian extremist have so much more control over the world's wealth that their extremists seem more panacondaeaceful than the Islamists. Take away the world's largest military and you might see them strapping bombs to their chest, too.

They are equally bad. Just like the rest of them.

Islam. If I had to pick a worse. Its still where Christianity was 600 years ago.