Donald Trump on Saturday posted seven pages of social media rants about how he is “entitled” to full presidential immunity from all criminal charges, causing legal experts and political onlookers to rage over the messages. “IF THEY TAKE AWAY MY PRESIDENTIAL IMMUNITY, THEY TAKE AWAY CROOKED JOE BIDEN’S PRESIDENTIAL IMMUNITY,” Trump wrote in the first post on the subject Saturday. That stood out to former federal prosecutor Joyce Vance, who said, “My initial reaction is that this is dumb because Joe Biden doesn’t need presidential immunity, he hasn’t committed any crimes. But more properly read,…