Or the other way I usually put it:
“For example, they grapple with how one can be commanded to kill a child of certain nations. This is a very serious question. It is compounded by the fact that simple answers like they will grow up to be wicked, is also a justification for the Jews killing our children.”
I don’t see the question. Wiping out Jews is right because Allah (Or Hitler) said it is (see Sahih Muslim). Killing anybody else is wrong for the same reason.
“So it is very convenient for the Wahabbi world to just smugly say that our religion says so, end of story. Because that raises questions as to how we look on in horror when an Israeli terrorist kills one of our children. He believes just as strongly that his religion is the only true one, and has commanded him to kill Arab children R”L.”
He can believe whatever he wants, but he his beliefs are mistaken. Therefore, all of the actions undertaken in the name of these mistaken beliefs are objectively wrong.