Stephen Miller is a white nationalist. You can preface anything he says with that fact and it'll tell you exactly how much credence to give anything he says.
For example, "Stephen Miller is a white nationalist who says that left-wing terrorism is on the rise." Or, "Stephen Miller, a white nationalist, says that leftists are inciting violence against law enforcement." How about, "Stephen Miller, who is a white nationalist, can leap headlong up his own ass at the first opportunity and lay his toxic eggs in his own colon."
Ok, maybe that last one is just rank speculation, but you get the idea.