The problem with couching voting as meaningful antifascist defense is that the partisan machine of fascism doesn't just shrivel up and die being swatted away from seizing State Power, especially when fascists have both Capitalist and State benefactors bankrolling the entire machine. Unlike our plucky asses that are entirely self funding off hourly wages and passing the same worn 20 around, they have deep material pockets to wait for chances and kid gloves deployed against them when taking chances.
It's like, if you can see a whole ass army marching towards the bastion, reinforcing the gate might avert a calamitous outcome, not the entire calamitous problem of an army mustering, marching, arriving, mounting a siege and starving out the bastion with regularity.
And there simply isn't an Electoral program that is dedicated to preventing the muster, march and arrival of fascists. There isn't a program within the Democratic Party that even sniffs it.
A huge part of why is Nationalism baked into the very fabric of Liberal Democracy where the Nation State's existence is more sacrosanct no matter how bad it gets, with the flimsiest pretenses of self governance allowed by The State keeping the illusion of Liberal Democracy intact and a single legitimated conduit in voting, the bastion gate, the focal point of most partisan agency.