Filtering an employer that finds having a couple clearly established moral boundaries "pretentious" would probably be working as intended.

I'd call this specific, or focused, not pretentious.

I wasn't making the accusation, rather asking if you may have missed some opportunities by coming across as it to strangers.

Being a contractor, its a perceived strength to be as flexible as possible.

I review a fair amount of resumes and I wouldn’t give it a second thought if I saw that. I’d probably assume it was a religious requirement of some sort before I even considered other possibilities.

As someone who reviews a lot of candidates, I would appreciate it if someone was to tell me up front whether or not they are interested in the kind of work I am offering.

I think this is a good thing. I'll take honesty and transparency over perceived flexibility any day.

+1.

I work in neither in Gambling nor Defense, but I still wouldn't hire this guy because he sounds difficult to work with.