Foucault and facism

Jim Hollis writes:

If you remove the power from the truth then how could Fascism, which
claims both, be a viable possibility?

I answer: We probably can't get too much into it here, but I'd
always thought that the fascists and Nazis were openly pretty
cynical about their manipulation of the masses.

And besides, Foucault doesn't say we should remove the power from
truth. He says that we need to detach the power of truth from the
current hegemonic structure.