If Bob were a Trumplican then he woulda stepped aside when he was running against Buchanan. Instead he labelled the whole branch extremist.
Bob Dole LOST. Handily. 20 years later the ‘extremist’ branch WON. Handily.
Buchanan would have lost too, and probably done worse than Dole. Personality counts for as much or more as ideology, and Buchanan didn’t have the appeal Trump did. The economy also counts for a lot: Clinton was riding the tech boom and nobody was going to beat him.