They watch the TV network that tells them every single day that huge numbers of illegal immigrants (or other scary brown-skinned people) are the reason for all their troubles & fears. They always hype the false story that there is a huge caravan of migrants approaching US borders but only during lead-up to elections.
Trump is persecuting the same "others" that the "don't tread on me" group also hate. They only wave their weapons when Democrats are sitting in the White House.