Because if we dehumanize persons, we are also fascists.
That said, Trump has gotten more than due process. He should be serving a sentence for he 43 (?) felony convictions, it is a miscarriage of justice for the sentence to have been nothing. And, that's not the only example of "the system" being corrupt in his favor.
While I still hope for reform, revolution is appropriate ever since SCOTUS ruled on presidential immunity (yes, under Biden).