When seeing a trend of a common narrative, even if it's socially or corporate driven, look for opposing ideas.
The good news is you can spot these people easily by just asking them to explain why they believe the opposite. And if they answer with empty platitudes or lofty statements that don't really address the specifics of the issue at hand, you can keep searching.
Obviously, he got votes from a lot of normal Republicans, but there's a decent segment of support for him where people were apolitical before, but latched on to him out of sheer, immature contrarianism.