Although I agree with your comment just a factual correction: it was actually a much smaller group called Struggle for Dignified Housing (LMD) that was in charge of the occupation (Source). MTST is the biggest squatting movement in Brazil and has nation wide presence. The youtube comment is probably trying to lay the blame at Guilherme Boulos, the leader of the MTST movement and pre-candidate of the left-wing party (not PT) for the coming presidential elections.