For those that aren't familiar, the red pill is from the matrix where one is given the choice of a blue pill (go with the flow) and red pill (don't go along with the flow).
The red pill movement is a largely male movement that sees politics and pop culture through a different lense. Some guys include youtube personalities Stefan Molyneux and Ramzpaul. A lot of it comes from a gender angle but a lot of the red pill movement is into human biology and the like (takimag, chateau heartiste etc)
They sound like Ron Paul fans.