The old cliche is that you don't discuss religion or politics in polite company. The reason should be abundantly clear even on a Husker football board. You're not going to change anybody's mind, and all it is going to do is drive a big, fat wedge between people who otherwise share common interests and friendship.
Social media is like a rocket engine for division. I quit Facebook a year ago because the tribalism was making me hate some of the people I love most in this world. People get so caught up in it, and to what end? All it does is make everybody miserable.
Take a little free advice, or don't. I have a little exercise I do when I'm stuck in my two-hour commute, and wanting to murder everybody driving like douches around me. I look around at the other people in the cars. Not the cars, which are inanimate objects. The people inside. Then I try to image their backstory. They are all late getting home to pick up kids, or see their spouse, or get groceries, or unwind with a favorite show after a terrible day at work. We all miss time away from our loved ones, worry about money, struggle with the boring routines of life. Our differences in politics and religion are actually small differences.