No it’s not. Trump needs to get the GOP back onside. Or he will lose. That’s why he went after Ryan. No candidate can beat his own party, a billion dollar Dem campaign and corrupt media.
I agree with Trump’s strategy of attacking the GOP quislings as well as Hillary. My concern was that he did it too late. I see both sides of this. Don’t anger a portion of the party (and there are many GOPers in everyday life who love the Romneys and Ryan’s of the world) or attack them scorched earth. I think Trump’s greatest strength through this whole race has been his outsider status and an argument could have been made to run against both parties early on. Trump tried to play nice but they ended up knifing him anyways. It’s not in his nature to hold back.
I think at the end of the day he goes both barrels blazing on the GOPe and Hillary and hope that energizes his base enough that someone is fighting the quislings and Hillary while pulling enough Independents to win.