Fascists don’t respect democracy or even other people’s rights, so it’s logical that democracies should not trust them in positions of power. It’s basically the paradox of tolerance: “if a society extends tolerance to those who are intolerant, it risks enabling the eventual dominance of intolerance; thereby undermining the very principle of tolerance.”

And if you want to see what happens when these kinda of people are left unchecked in the cause of retaining the “moral high ground”, just look at the USA. The USA democrats have been giving in for 40 years against increasingly perverse transgressions by republican actors, and now it’s a dumpster fire on the cusp of becoming a full blown dictatorship.