Sometimes you have to fight¹, but other times engaging with an open mind² really is the most efficient strategy. Shouting at the opposition only cements them in their own thinking; to change minds you have to understand and engage them where they’re at. And yes, this is way easier said than done and can be quite frustrating.
¹ You probably won’t convince a fascist dictator to change their ways by appealing to their better nature, and it would take too long while irreperable damage is being done.
² Even if the other side believes in something appallingly hateful.