Hitler accused them of being Socialists.
No, he accused them of plotting a coup. It was claimed the SA (the previous security arm before the SS) was going to stage a coup, and put Ernst Rohm in charge of the government, known as the "Röhm Putsch".
And no, they were never accused of being Socialists. They were accused of "homosexuality, debauchery, drunkenness, and high living", in addition to the claim they were about to hold a coup.