The issue here is likely that you aren't familiar with what fascism was.

Trump, Biden, and Harris are all liberals, as in of the popular ideology of capitalism. They are in favor of markets to "solve problems" and tend to try to remove barriers to them. When organized labor threatens this, they try to have it both ways by saying they are pro-union while doing strike breaker things in action. When finance demands blood, they assent, whether this is domestic in the form of raising unemployment or cutting benefits to make workers more desperate or overseas using similar financial tricks or just straight-up war.

Fascism was a political movement that really only existed for a short period as capitalism emerged as fully imperialist and countries that had too small of a piece of the pie but a people that expected a big one had a serious contradiction between liberal policies (which would see their material well-being and status decrease) and the need for imperialism to carve out that inter-country exploitation to offset this. Fascism was born as an anti-liberalism, a faux anticapitalism, that sought a restoration of a semi-imagined past glory, an ascendant nation built on imperial expansion, and various aesthetics and scapegoats serving these ends.

It is currently impossible for a US president to be an actual fascist. The US sits at the throne of international capital and every major candidate seeks to maintain this system, not tear it up for further expansion because it is somehow behind the other powers and faces being imperialized.

What is possible is for candidates to forward policies that are genocidal, xenophobic, racist, warmongering, pro-cop, pro-state surveillance, personally aggrandizing, etc etc. Sometimes people say this is what is fascistic. But these are all common features of liberalism! The main difference between the Nazi (fascist) expansion and genocides of Germany Eastward vs. the US expansion and genocides of indigenous Americans is that the Americans succeeded. They had the power and time and will to carry out the deed. The horrors of fascism are of mainstream liberalism, they were all inspired by liberal imperial conquest, industrialization, and mass murder.

But again, none of the candidates are actually fascist, they uphold the liberal status quo. Trump is just more rude about it. He openly scapegoats immigrants while Biden and Harris simply pretend to care about them while implementing the sane or worse xenophobic policies. Notice how Democrats tried to outflank Republicans with their border bill? How they are projecting a "strong" border? That the Biden admin is completing sections of Trump's wall? The massive ramp up of rejecting and deporting asylum seekers? These are all fascistic things. The difference is largely perception. Democrats don't care about kids in cages when they do it. The topic isn't even covered, there are no PR pushes. It fades into an uncognizant background normalization where the average Dem assumes it is all over without actually checking on the detention centers or listening to the people doing solidarity work for those inside them or the people waiting just across the border in terrible conditions.

And again, the Biden-Harris administration is committing a genocide via full material and diplomatic support for and defense of Israel.

If you oppose the horrors of fascism, you need to begin actually questioning and opposing the forces that create and maintain them. That includes fighting against people like Biden and Harris, who have at least as substantial of a legacy of such material harms, if not more. Again, genocide. Do not support genocids. That is not an okay thing to do.

Or do you disagree?