Of course he was. He delivered the keynote speech at the 1992 convention, his culture war speech, which was widely acclaimed. This after his tepid dabbling in Holocaust denial. And yes, plenty of Republicans recognized the mistake, and felt it contributed to the Bush defeat. Just as plenty applauded it. He wasn’t drummed out of the party, he left.
He left because he didn't feel welcome, because too many Republicans didn't particularly care to be associated with him, nor did too many support him in the GOP primaries that year. He felt like he could make more noise as a third party candidate. And, as far as many Republicans are concerned, good riddance!
By sharp contrast, prominent antisemites in the 'Rat party are still active, hold high offices, and seem to be highly regarded in party circles.