So, is it just unfortunate collateral damage, which we aren't responsible for, and besides it'll never come back to harm us in any way? That kind of thing?

Hard to answer your question(s),with a Yes,or No.Who is more responcible,for those civilian deaths?The invading force,(after disclosure of intent)or the leader(s)of the oposition who did not evacuate them(for whatever reason(s).Come back to harm us?Not the dead one's.

I hope!.To address your following question/comment,"Them ragheads are weaklings and we can kill as many as we like, because there ain't dick they can do about it?