The new pope is a balanced papal leader with a biblical message, but that hasn't stopped MAGA allies from being enraged about him being elected.
Pope Leo — lately Cardinal Robert Prevost — was one of the types of cardinals in the crosshairs of a MAGA opposition research and smear campaign to disqualify moderate and progressive cardinals for the Papacy. They wanted a MAGA Pope, a cardinal in a red baseball cap willing to turn the Church of Rome into one more echo chamber.
The fact that Leo is an American from Chicago makes them more furious. He understands our politics and culture in a way no other candidate for the Papacy would have, and this frightens MAGA TradCath types who wanted a Trump ally in the Vatican.