Argument against religion per se
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By finding contradictions you discredit a religion’s founder.
That which taketh away the reputation of wisdom in him that formeth a religion, or addeth to it when it is already formed, is the enjoining of a belief of contradictories: for both parts of a contradiction cannot possibly be true, and therefore to enjoin the belief of them is an argument of ignorance, which detects the author in that, and discredits him in all things else he shall propound as from revelation supernatural: which revelation a man may indeed have of many things above, but of nothing against natural reason.
Hobbes, Lev XII 25
By pointing out hypocrisy and meanness, one undermines religions or at least religious people.
That which taketh away the reputation of sincerity is the doing or saying of such things as appear to be signs that what they require other men to believe is not believed by themselves; all which doings or sayings are therefore called scandalous because they be stumbling-blocks that make men to fall in the way of religion: as injustice, cruelty, profaneness, avarice, and luxury. For who can believe that he that doth ordinarily such actions, as proceed from any of these roots, believeth there is any such invisible power to be feared as he affrighteth other men withal for lesser faults?
That which taketh away the reputation of love is the being detected of private ends: as when the belief they require of others conduceth, or seemeth to conduce, to the acquiring of dominion, riches, dignity, or secure pleasure to themselves only or specially. For that which men reap benefit by to themselves they are thought to do for their own sakes, and not for love of others.
Hobbes, Lev XII 26