Two points: 1) Scotland has a Not Proven verdict. If they weren't sure, they didn't have to acquit, so I think they were sure.
2) Scotland certainly has the high moral ground here - other people's bad behavior is no excuse for your own. I am reminded of a song... something about you take the high ground?

Also, I don't hear a lot of outrage from other people who, like me, have lost close family to terrorists. It's mostly the less-affected who are so up in arms, it seems to me.