I think if Kawhi, more specifically his camp who continues to leak things, could be professional about next season and actually have an open mind, Spurs fans will take him back. If he's healthy and wants to be here, the guy is our future. Plain and simple.
But if he continues down the path he's on, is unprofessional, creates locker room problems, tears the team apart, has his "group" leak BS to the media, etc., then you're right and the Spurs can't have that.
As much as I'm done with Kawhi at this point, I realize there's a reason why his family won't let him meet with Pop one on one. Kawhi isn't a terrible person. He may be more weak mentally than we all originally thought, but I honestly don't believe he's a bad guy. I think he and Pop truly care about one another, and if Pop and the team can tolerate him back, so can the fans.
Best case scenario for Spurs fans - Kawhi is 100% healthy and wants to stay in silver and black for his career. But only PATFO can determine what's best for this team right now.