If you can’t describe at least a few downsides to your tribe’s vision for humanity you haven’t asked enough questions. Extremists, almost by definition, don’t see the downsides to their own views. This is why they don’t like “centrists”; we ask questions they don’t like the answers to.
“Centrists” understand that calling everyone you disagree with a fascist takes any real meaning from the word, and removes any possibility of convincing those people that you want to include them in making the world a better place. Progress on societal issues requires bringing society along. Extremists start wars. “Centrists” make progress.