Don’t do that, his followers are indeed Christian. I don’t accept the no true Scotsman fallacy, Christians do evil and these people are the dregs of the religion, not outside of it.

Theism is believing in what is not there, right?

They seem pretty christian to me.

Christians throughout history have been vile, brutal sub-human pieces of shit who abuse, torture, molest and murder everyone around them. Modern christians supporting Trump are pretty on-brand.