I wasn't aware of any ad hominems
except your own with respect to Einstein (= possibly a parody of Q's rubbish ?).
As for Einstein being "religious", opinions are divided about his unorthodox
Spinoza-istic references to "God". That absolutist concept seems mainly to reflect his belief in an underlying "absolute reality" which had the property of "certainty", in opposition to the rival paradigm of probabilistic quantum mechanics. He obviously made significant contributions to "scientific progress" with his early contributions, and even his opposition to QM could be said to have provided a stimulus for its verification via experiments confirming Bell's equation.
There can be no debate about Einstein's contribution to science. A more interesting question about religiosity might be raised about another celebrated scientific figure, Heisenberg, who was at least was a regular church-goer.