To admit that John McCain was a shitstain on America's underwear.
Many of the problems the GOP faces can be traced to John McCain's "leadership". You wonder how Donald Trump got elected? Because voters got tired of political leaders like John McCain, a two-faced, back-stabbing, lying, egomaniacal, big-state war-mongering asshole who destroyed anyone who got in his way of a bigger paycheck.
I'm glad he's dead. I'm glad he's gone, because then he can't do any more damage. Unfortunately, we still have too many John McCain acolytes in the GOP.
Oh, and let's be blunt - John McCain's own family politicized his funeral. So fuck them too.