If you can’t judge those who last their emuna you also can’t judge those who kept it.
I think it’s also important to define what we mean by judge. There is the judgement of that which is right and wrong. And then there is judgement as to how hard it is for someone to do the right thing. The latter we can no judge but certainly we can deal with what one augut to do in certain situations. That’s what the Torah is for telling us how to live.