I personally think I can't easily be manipulated by (social) media. I always try to make up my own mind, by discussion, by researching etc.
But you can never be sure. We all can be manipulated by using certain psychological tricks.

I may be special here (I overthink almost everything ...), but I can see that most people, even near me, fall for the easy stuff: they trust what they here most! It's crazy. But they believe the guys that "scream" the most. And I think this is the main problem here.
People are too dumb, lazy or both to really think about what they hear and see. If the see a guy like trump shouting racist stuff about mexicans  the 1000x time, then they believe him.

It's way easier to blame others for your own problems, than think about yourself - and how you can solve your own problems. Sad but true.