Sorry, but there most assuredly IS another explanation. It’s a binary political system here in the USA. This is not Canada, for example, where there are multiple significant political parties. Here we have just two political parties of any importance, the Republicans and the Democrats.
I find the policy objectives and thinking of Democrats abhorrent, completely intolerable, and wildly at odds with traditional American values. Socialism did not build America and make this country great.
Point is, what you view as one dimensional support for President Trump, whom you abhor I understand, is in reality multi-faceted hatred for virtually all Democrat positions on any issue you might care to consider.
We put up with Trump’s eccentricities because he alone is willing to be the point of the spear aimed at the very heart and soul of wicked and distorted Democrat thinking. Trump is not perfect . . . far from it. But he is the best we have, and he is hugely preferable to Democrats right across the board.