Even if Singularitarianism has no evidence base (which I'm not saying is the case), that's not enough to show that Singularitarians are fideists. According to Wikipedia, "Fideism is an epistemological theory which maintains that faith is independent of reason, or that reason and faith are hostile to each other and faith is superior at arriving at particular truths..."
If Singularitarians believe that they have enough evidence to justify their position (most of the ones on here do believe that, as far as I can tell), then they aren't fideists even if they're wrong. A fideist would believe that ey didn't have evidence and didn't need it; most Singularitarians believe that they do need it and do have it. So they can't be fideists; the worst they can be is wrong.
Federov's Rapture at Charlie's Diary
This is a follow-up to his article on Singularitarianism last week, which was also discussed here.
His own introduction:
I'm not sure if the point is really anything more than guilt-by-association, because he doesn't really make a complete argument for anything in particular.