Yes. You should focus your energies where they can do good. It's pointless speaking to a Trumpist. You will not reach the person, and in your conversation, you let the Trumpist spew all manner of lies to anyone listening. Remember, Trumpists cannot persuade people with facts and proper arguments, because they have none of those. They need a foil that they can point to in order to persuade anyone. Don't be that foil. Don't engage.
Trumpists should be shunned by polite society. They are welcomed back when they realize their error and make amends.
Is making amends so important?! When they find out what Trump actually represents, and some Trumpists do, they may devote some their time to persuading others who haven't yet left the cult.
Shunning Trumpists makes it too easy for them to avoid cognitive dissonance.