Scalise and McCarthy were NOT buddies. There animosity has been widely reported. But Scalise was enough of a professional to get along.
If you think that this very-thin majority caucus is going to get anything done without discipline, cooperation, and compromise, you’re living on another planet.
If Scalise turns out to be another uniparty RINO who won’t stand up to the Democrats, there’s no point in having him be speaker.