Lots of people are calling conservativism and even libertarianism fascism

We do so because they keep siding with fascists and promoting their policies. They side with gutting social safety nets and worker/consumer protections.

Replacing the EPA with a market driven EPA is just not going to solve problems; otherwise the market would have before getting to the point of having an EPA.

Fascist want a small government because it will be easier for them to topple. Libertarians are at best naive to ally with them.