From what I gather, many evangelicals who support Trump see him as a fighter against a corrupt worldly government and a champion of their causes.
Then there's the MAGA concept, which plays into their Great Replacement paranoia (the fear that the white Protestant American majority is being replaced by non-whites and non-believers).
The fact that he is about as far from Christ-like as it's possible to be doesn't seem to deter them all that much.
Nah they got it right the first time.