Many of my conservative acquaintances find the death of those kids to be regrettable in the way you come back to find your car over the line regret your parking job. Certainly they do not feel the tragedy nor any responsibility.
The some few i mentioned who see it as a positive are the ones who say nuke Iran, the only good Iranian is a dead Iranian etc. They might not come out and say I’m glad those schoolchildren are dead because they’ll know they’ll get pilloried. But make no mistake in what they believe.
I find this really hard to believe. People are sick of the Islamic Republic regime, not the person on the street. If anyone implies the two are the same thing then they're being intellectually lazy but I bet if you pressed you'd still find them capable of nuance. People do have some humanity even if little patience for a terror exporting regime