Ethiopians are muslims?
The vast majority are Christians, but a lot of them are Muslims, yes.
A little backstory...
I was at Six Flags last week and observed 2 Ethiopian men and 1 woman videotaping one of the rides from a position that didn't make any apparent sense. I'm thinking, "Why would they choose that location from which to film?" So, I snapped a few pictures of them. I can't say exactly why I thought they were up to no good, but that's the climate of fear and paranoia that's been created.
Of course amusement parks are great terrorist targets, but that doesn't mean that the little African family looking to preserve some memories of their day are involved in anything like that.
When the young African boy and an older guy got off the ride and joined the others, I did feel a little bad about having been suspicious, but I never confronted them and I didn't do anything to infringe on their fun.
So, I'm quite comfortable with what I've become.

(the hyper-awareness thing could grow to become a problem for me, though)