Such sweeping statements as your 2nd paragraph are SOOO inaccurate and disingenuous.

For SOME Republicans, you're right.  Just like for SOME Democrats that do the same type of thing from the other side.

But that's only SOME.  Heck, anyone that can't see that large swathes of Republicans thought (and still think) just the opposite about Trump than what you describe wasn't paying attention during the nomination.  More than half of the party was fighting Trump's nomination tooth and nail, not just voters but top party leaders all over the place.  Trump had the LEAST support from the party and it's members than any party nominee in modern history.  

It just happens that D's ran someone with just as many problems (different problems, but big problems nonetheless).