Seriously, all I see in reference to McCains name here is stuff like "lesser of two evils", "not a true conservative", "death of the GOP".
What I don't see is any reason for the abuse. Few posts that I've seen state why they dislike him, or states what they would prefer his platform to be.
Honestly, he has many positive qualities; war hero, supporter of campaign reform, enemy of pork-barrel legislation; but I haven't seen many people discuss these.
This man will most likely be the GOP candidate for POTUS, instead of bashing him, contact him and explain your qualms. Its easy to bash something or someone, rather than admit you don't care enough to do something about it.