The reason that many support him is to do with their wanting - whether projected through Trump or otherwise - power and control over other people and how they are allowed to live their lives. It's about control versus live-and-let-live. It's always been about that, even tho' the exercise of the freedoms they oppose don't affect their own freedom in any way.
Hence they want state control of women's bodies when it comes to choice re. abortion. Hence they want non-whites to be 'kept in their place'. Hence the chants of "lock them up" when it comes to public figures seen to be different (e.g. ' liberals'). Hence the opposition to allowing gays/lesbians to marry. Hence the deification of the police as instruments of control. And so on.
The alleged "Christianity" of evangelicals, for example, is just a thin camouflage for this desire for power and control over other people - with Jesus (and Trump as his surrogate) projected to be a sovereign king who will return to rule with a rod of iron and punish the "wicked".