It would be more like the Hart Foundation in 1997 dynamic. They were heels in America and faces everywhere else.
Kaepernick would make them heels to one segment of the fanbase, and faces to everyone else.
I'd love to see Kap get signed and then forced into action. Then we'd all wonder what the fuss was about and how it could be that folks speculated that he was better than half the starters in the NFL blah blah blah. The dude is wildly overrated and stunk the joint out the last season he was on the field. His sell by date expired a while ago.