Just how can you complain about Trump’s boorish egotism when you decide to shun the person whose career you ruined, and who has been nothing but loyal?Palin has pointedly never bad mouthed McCain when it was clear she was badly treated by his campaign staff. Her exclusion from the funeral is a classless move by the McCain family, as was asking Obama to speak.
McCain was sui generis. Once the funereal hagiography ends, I'm not sure what party might claim John McCain. It can't realistically be Trump's Republican Party.