I hate to tell you this, but choosing Donald J. Trump as your presidential nominee three times in a row does mean that he speaks for your party. Nearly all dissenting voices in your party - Romney, Cheney, etc. have been labeled as RINOs and driven from party councils. Nearly all others - like Nikki Haley or Ted Cruz or Lindsey Graham - long ago bent the knee and whatever they think of Trump in private they go along with what he says and wants in public. So not all Republicans are opposed to abortion, but polls show the vast majority are, Trump brags that he appointed the Supreme Court justices who overturned Roe, and red-state governments across the country have passed harsh anti-abortion laws even in cases of rape, incest, or the mother's life being in danger. And the bulk of your party is pushing for a national abortion ban, and while Trump himself claims he doesn't support it the record of your party on the abortion issue does not provide many grounds to believe him. And the same can be said about a host of other issues.
So you never believed that Trump was going to pay for the wall or that Mexico would pay for it, but you still supported him because you supported his policies on the border or immigration? Do you not see how that sounds - you didn't mind Trump wasting taxpayer money on a wall just because maybe we would be tougher on immigrants? If a man tells you he is going to use the government to round up 11 million people using the military and law enforcement it is best to believe him, but if you wish to excuse him at least making the attempt because in the process he might "get a few bad ones" then go ahead, but that sounds like a pretty awful justification and rationalization to me. You can keep rationalizing that Trump isn't going to do all of these terrible things - things even you admit would be bad - because in the process he might do a few things you support, but it sounds a lot to me like the old "to make an omelette you've got to crack a few eggs" excuse. And I would much prefer that Trump never get the chance to put any of his threats and policies into place, no matter that he might do a few things you agree with along the way.