Since Trump is being deceptive and taken advantage of peoples ignorance it is pretty important to try and reach those deceived and ignorant people so opposition grows. Is just like any resistance really, educate other people if mainstream media isn't helping, that is the best way to rally support. Dividing is what the winning side wants, it's how they won the elections basically.
How do you propose educating those deceived and ignorant people when they only believe sources that reinforce their own beliefs?