You are describing weasel words. "Experts have discovered... Scientists have proved that... Most people claim that... It's been said that..." These expressions belong in the gutter press and popular science articles (I could weep sometimes). But "religionists" was specific enough to escape that criticism. Had he said "believers" or "the God Squad" you'd have had him bang to rights, but he didn't. "Religionists" has its own clearly-implied qualification that separates the people in question from the mass of religious believers. You wouldn't really deny that most, or all, religionists, people who are outspoken and zealous about their belief system and who go into attack mode against their critics, "take the weakest assumptions...to discredit the whole Big Bang theory," would you? I've yet to come across one who doesn't behave in that way. (Speaking as I am shortly after my regular visit from or local Jehovah's Witness. He knows better than to take me on, and he's a smashing old boy. He cadges my apples in the autumn). Now excuse me as I have Awake! and Watchtower to read, which I always do.