Ultra conservative speakers can't speak, nor do I support them because "ultra conservative" implies 'racist/hate-mongerer.' Milo Yiannopoulos is not, by any definition, 'ultra' conservative.
And maybe the concept hasn't reached your little redneck community, but you seem to have no idea about "no-platforming" which is frequently taking place in the Canada, the UK and, yessir, the United States of America.
The concept is simple. Do not give certain individuals any platform to speak. It's also not just conservatives who fall victim to this, many liberals (if they're not the right type of liberal) are no-platformed. One of the most influential feminists of the 70s Women's Liberation Movement has recently been totally no-platformed from all UK campuses due to comments stating that transgender men are not really women.
"You have a differing opinion to us, you have no right to speak!!"
Viva Mussolini! #fascist mobben