NAZI buttmunch doesn't understand the 1A at all. It prohibits the Government to infringe free speech. Turn Verein is a private club, with the right to control the use of its property as it sees fit. Disinviting a bunch of totalitarian morons is a thoroughly appropriate exercise of that right.
"Still, in a funny way, it's important to have groups like Mr. Mueller's deny the murder of six million Jews and a million non-Jews, because it convinces the rest of us how vital it is to keep the memory of the Holocaust alive."
Somebody's denying the murder of about five million gentiles ... Kind of ironic that the denier is in the same breath condemning holocaust deniers.