Consume Product

Because this rhetorical point by Christians is a blatant falsehood.

The famous millstone verse isn't prescriptive. He doesn't say "go drown pedophiles." He says "it would be better for a pedophile if he'd been drowned than allowed to carry out his evil deeds in the first place."

He's talking about eternal punishment, not earthly exhortation, as is the case in many instances. It's similar to when he says it would be better if Judas had never been born. Retroactive and reflective. If you applied the same logic here that OP tries to use on the millstone verse, then Jesus should have killed Judas personally and justified it after the fact.

This is true of every vintage conception of "Christian violence." It's all future-facing, hypothetical, and meted out by God himself as a matter of divine judgement after death. You're spit on, humiliated, and utterly bested in this life, but God rewards you with heaven for enduring and burns your enemies forever. The original Two More Weeks.

This didn't change at all until Just War theory in the 4th century. And even then, violence only became permitted within a very narrow set of parameters (particularly that only the state could authorize it.) The reason being that they were trying very hard to not look like they were completely undermining the entire pacifism-inclined history and theology of the church up to that point.

Something about a millstone around their neck

What did Jesus say should be done to anyone who would hurt a child?