Do you have some examples of this behavior?
with no regard as to how their religion might be affecting that which upsets them about the person.
I read this several times and I'm still don't understand what you are getting at.
If he ever comes back to this thread, and explains more fully: ping me to it, please.
For examples all you have to do is go back over the last few years and look at all the anti-Romney screeds.
As for the sentence that baffles you, many consider their religion (outside that most are Christian) to be the one true religion and any religion that goes counter to theirs is fair game. I find it ironic how they will flail at Mormonism (which, contrary to common belief here I do not believe in) and will point out all its flaws while ignoring where their own religion may deviate from the Bible and have to be "validated" by all sorts of tortured rationales.
My main point in the many times I point things out is that so many Christians get diverted from carrying the good News because they feel more inclined to carry what's wrong with other religions. They seem to think that they are praising and glorifying God when they trash what they deem to be false religions.