The language is loose. But in a less atheistic forum, I might say the evidence of God is "ambiguous, at best." I'd never say that evidence against God is ambiguous.

Functionally, it's a politeness-induced vagueness, not intended as a precise statement of the OP's confidence in the state of the evidence. Or so I read it.

And calling people out based on politeness-based vagueness is an aggressive stance that does not appear to be justified in this instance. Particularly since:

making self-assured apodictic assertions about difficult and controversial topics, without any supporting argument and in a way that implies that reasonable disagreement is impossible

is a valid, interesting, and totally independent criticism.