It will do no good to post actual data. I've literally cut and pasted CDC data about Covid cases and morbidity in youth, middle age, etc. and had it refuted by talking points from certain posters. Some will merely post and re-post their opinions and point to others who agree with them (no actual verifiable data mind you, just opinions) and believe that if their opinions are more strongly stated than others, then their opinions amount to be right.
In the end, two things drive the mask or no mask viewpoints and policies: those who see personal risk as normal and acceptable and a matter of choice, and those who don't. And, two, adherence to a particular political philosophy and the agenda that flows from it.
People are entrenched. So, on the one end, places like Florida will approach it one way, and places like California virtually the opposite. No point in debating it further.