"Liberals think fascism is anything that opposes progressive policies."
No, fascism is just trying to control people's bodies, trying to control who can marry who, trying to force religious morals on everyone, trying to force class division between the poor and the rich rather than breaking down those barriers, trying to grab power at all costs.
The mere fact that conservatives thought the election was rigged and tried to overthrow the government as it was is simple proof of their fascist tendencies. The fact that so many of these mass shooters are right wing is more proof. Resorting to violence when you're not getting your way? Just way beyond not being moral.