It's not hard, you ask him to come for a meeting at specified date and time, tell him it's not working out, pay him the year left on his contract and hand him his P45, how complicated is it?
The bigger issue is noone will have the guts or be able to sack him, if Kroenke likes him (and let's face it he couldn't care less about football and the club is still making money) there's little incentive to sack him.
All this talk about respect annoys me as well, where is the respect from him, he doesn't deserve respect the way he's behaved to be honest, that ship has long sailed.