It should. It's extremely bad to exclude people for disagreeing with their political positions. We need to learn how to disagree politely and civilly, and how to keep our disagreements from bleeding over into our total personal evaluation of the opposing person. That's applicable to both sides. Our civilization and democracy depends on mutual toleration and an ability to separate the personal from the partisan.

Cutting people off only further isolates them. If you really want to convert Trump supporters, you have to show them the error of their ways gradually, just like with everything else. Writing them off as irredeemable based on their political preferences is not only inadvisable, but fundamentally destructive of the binding social fabric of the republic.