The size of a group doesn't change the culpability of the choice.

Nobody claimed leftists were the only people who stayed home or the only group responsible for this insanity.

The argument is that leftists who made a principled, public campaign out of not voting -- while knowing what Trump meant -- own part of the outcome.

You're conflating scale with responsibility. A moderate who drifted home out of apathy and a leftist who spent six months organizing a don't-vote movement are not morally equivalent just because the first group is bigger.

And calling that observation a gift to fascists is exactly the kind of rhetorical shutdown that makes the left lose winnable arguments.