It makes him look ineffective, but none of this (or anything) will have any effect on the heart of his base. Besides, if these people ever do decide Trump isn't doing it for them, they won't be coming back toward the middle to seek common ground. They'll go looking for someone even worse. Because the hard Right believes if extremism fails, it's because they weren't extreme enough. The only silver lining I can see is that as they start marching even farther into batshit country, maybe whatever contingent is unwilling to actually start literally flying Nazi flags just gives up and withdraws altogether, shrinking the number of extremists enough to give the GOP establishment a little more breathing room to compromise. But even that is probably impossible until someone proves in 2018 that the extremists are no longer strong enough to bulldoze an establishment candidate from the far right. Which would give us the benefit of a GOP that is merely dangerous, not also radical and insane.
Mind you, all of this is what now qualifies for "unicorns shitting rainbows in Utopia". In the real world, the Kekites will probably manage to radicalize another few million people and that turnaround the Democrats expect in 2018 will turn into yet another trouncing due to their continued inability to gain control of the conversation between now and then, thanks to the Democrats' seemingly infinite ability to think inside the box and play the game like it's still 1985.