"Progressive" doesn't really mean anything beyond "left of establishment democrats." They range from liberal to socialist. Fascists are a twin of liberalism, worse but fundamentally connected.

If you're not anti capitalist and anti bourgeois democracy even if you're "progressive" you're just a flavour of liberal. Fascists are obviously worse than liberals although they tend to agree on a surprising amount of things when push comes to shove unfortunately. Scratch a liberal and a fascist bleeds is a widespread phrase for a reason.

The formula for a fascist is liberal plus time, multiplied by war