If you are talking about what people do "in the name of religion," then I am sure, in fact certain, that if we compared groups, one will stand out more than others.
As a Jew, I think we would come out on top merely because we're much older than any Christian religion and have survived throughout the eras where our heathen neighbors and their religions did not. Being around longer and due to the fact that my ancestors failed repeatedly to learn the lessons of peace and redemption from the Lord, we have a history of atrocities that go back thousands of years, added up to more victims than probably most religions can claim. It's just simple math.
So if you're going to condemn religions, why not go around saying the same thing about Jews you say about Catholics or JWs? In fact, I dare you to make posts all over the Internet about it. Go out and shout it in public. Try it and see what happens.
It won't go over very well, will it? In fact, you are smart enough to know that you will get in a lot of trouble, very quickly for attempting to do something like that.
Why? Because it's hate speech.
You see there is a difference between pointing out that people, groups, and even religions have engaged in atrocities. In fact justice demands it. But the line gets crossed when we do this because we don't like the subject of our focus.
When we don't do it to correct what needs to be corrected, to inform and educate, and we have an emotional investment because deep down we equally hate--we're not just angry, we equally hate--that's different.
To a degree what you say is right on the button and important. Your passion is not displaced when you speak, I am certain. But just as I can't blame the Germans of today for what their ancestors did to my family and relatives and race, we can't blame Catholic today for what they did generations ago.
Catholics have many problems now, true, but they are also not the same church they once were. Vatican II in the 1960s changed them for the better. They have stopped proselytizing the Jews, they have admitted to their long lists of crimes and errors and are actively working to correct and reverse things. Today they have a pope who even said the word "gay," and in a non-judgmental light. Who would have thunk?
You shouldn't excuse the crimes and sins of the past, but there's no reason not to forgive where you can and where you should.
If you were a horribly judgmental person at one time and sowed hatred and ignorance and falsehood but then suddenly changed your life around, and I mean became a completely different, kind, just and liberating soul, would you want people to refuse to see you as you are today? Would you want people to only judge you on the basis of what you were like when you were that terrible person?
Guess what, we who were once Jehovah's Witnsses were each that very terrible person. Don't we deserve a chance to be seen as the newly changed people we are? Or would you think it fair that people always see us as we were when JWs?
Again you are correct in your comparisons, but you are talking about a past of a religion that has dramatically changed. It's not perfect yet, maybe never will be, but neither are any of us who were once that horrible judgmental JW.
Whatever you choose to do with this comparison, you need to treat people fairly. Fair is not expecting others to treat you any different than the way that you treat others.