Trump is nothing like Perot. Perot founded his own third party; he did not run as a Republican. Trump is running as a Republican and shows no indication of withdrawing. He has already agreed if he loses the nomination fair and square he will accept it. If the party bosses shaft Trump, after he wins the delegates, then why shouldn’t the dishonest cheaters be hurt?
The GOP would sabotage Trump in favor of Clinton but I also echoed your points.