In York, the accounts say they did kill them. But it’s very different comparing a vadai babtisim (as in 1100s it was absoutely certain they would be forced or killed immediately), and a horoas shoh from baalei tosofos who were present in that tower, from present day when, even if their children were removed it’s NOT a vadai that havroas hadaas will happen.
And if the argument here is that it’s “mutar” in their preceived ciscumstances to murder children, then I think they should loudly proclaim that this proclamation is real and they are indeed prepared to murder children rather than allow removal from the cult. I think we all know how the yiddishe world will react.