Christians are hypocrites, so Christianity must be false.

Two moves, one logical and one pastoral. (1) The logical move: the truth of a claim is independent of the behavior of its adherents. Physicists can be cruel; it does not disprove physics. The move from "X's adherents fail" to "X is false" is the genetic fallacy. Christianity itself predicts and diagnoses exactly this pattern: "all have sinned" (Rom 3:23), including and especially those inside the church. A faith whose central symbol is a crucified man does not promise followers' moral perfection; it promises forgiveness and a lifelong process of renewal. Hypocrisy confirms the diagnosis, not refutes it. (2) The pastoral move: take the wound seriously. If a representative of Christ did harm, that harm is real, and minimizing it is itself un-Christlike. Jesus reserved his hardest words ("brood of vipers," "whitewashed tombs") for religious hypocrites. The Bible's internal critique of religious corruption is fiercer than any outsider's critique. The question is not whether Christians fail - they do - but whether the standard they are failing is true. (3) Historically, on net: Tom Holland (Dominion, 2019, and he is not a Christian) traces how hospitals, universities, universal human rights, the abolition of slavery, and the care of widows and orphans emerged from a specifically Christian moral imagination, even against Christians' own worst behavior.