Historically speaking, this was sometimes used as pretext for the permanent separation of children from their parents. This is a form of genocide according to article 2.5 of the UN definition:

In the present Convention, genocide means any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such:

[...]

5. Forcibly transferring children of the group to another group.

Normally I’d say they would be able to cash in on a lawsuit, but I’m pretty sure no judge these days will hear a case like this.

That's the point. He's trying to hurt feelings and stir shit up

Forcing a child underwater for their culture/religion has plenty of negatives.

they might get wet. if you have not contacted the lds church they have likely baptised you in abstentia.

That's what I am thinking. Religiously, it doesn't even mean anything. Islam is a bit flexible in that it allows sin/haram when forced by others (or even circumstances like health issues)

Also Christianity is an abrahamic religion AND hygiene is considered sacred in Islam. So from religious perspective, most muslims wouldn't even care.

Maybe the guy just want to waterboard foreigners and foreigner sympathizers? Most likely they want another case of "first we test-run on one minority, next we go for others."