Okay, first off this is threatening to rapidly degrade into a mudslinging contest, which I don't think is what we're going for.
Secondly, allow me to suggest an analogy that may help both sides to understand what's going on here:
Suppose I'm at a party, and from across the room I see a friend of mine set her drink down for a moment and a shady looking character pours something into her drink. The room is crowded and by the time I can get close enough to talk to her, she's picked up the beverage and is about to drink it.
Now, I don't want my friend to come to harm, so rather than politely waiting for the opportune time to let her know she may be drinking a roofie, I smack the drink out of her hand. Generally this would be a very rude thing to do, and she probably won't be happy with me, but I would say it's inarguably the right thing to do under the circumstance.
But suppose for a moment I was wrong. Suppose the the guy I thought was so shady looking was actually the guy who was mixing the drinks, and he'd forgotten to add the lime juice to my friends drink? Was it still the right thing to do to knock it out of her hand? I would argue that it was.
Now apply this to the present discussion. There are two groups with opposing views, and each is convinced that the other is doing themselves great harm by following their beliefs. Responses between the two tend to get heated, not because of any inherent hate in either group, but out of desperation to try and "help" the other.
Does this sound like a reasonable explanation to both parties?