You do not know what arrangement he had with his fiancee. It is safe to say that after a woman has been engaged to the same guy for two years, and there are wedding or even no wedding plans, the chick should move on. Eight years is rather long for any sort of credible engagement.
What it sounds like is the fiancee was a beard, rather than a real, actual, credible fiancee.
What he did surely took more guts than anything you or any other self proclaimed christian. It is not easy for a pro athlete to come out of the closet, and harder for a Black guy than a White one.
If you don't respect him, you can do that. The results are about those that would result from Tiger Woods eating half a banana.
I think he is brave. I think his fiancee has to be stupid.