Two women were arrested after they robbed and then intimidated three tenants out of their Brooklyn apartment — and the crime was partly motivated by race and class resentment, law enforcement sources said. Precious Parker, 30, and Sabrina James, 23, knocked on the door of an apartment building on Ocean Ave. near Newkirk Ave. in Flatbush at 9:30 p.m. on Thursday and held a 34-year-old man, a 37-year-old man, and a 25-year-old woman at gunpoint demanding they move out or be killed, police said. The women then stole $800, an iPhone and personal information