No. You sell to your kids that he was the greatest offensive player in Buffalo Bills history, and should be remembered as such.
You should pay tributes to that. If your kid becomes some criminal, or you think that the entire reason he can't figure out the difference between right or wrong is because you told him OJ Simpson was a great NFL running back, than chances are you're an awful parent.
Now stop forcing your sh*tty ideals down other peoples throats. If you don't want to remember him, don't. But don't tell me I can't tell my kid that OJ Simpson should not be remembered because you're a bad parent. Don't tell me I can't tell my kid that Pete Rose was a great baseball player because you don't like betting.
Are you going to falter when your child asks, "Daddy who is OJ Simpson?" Stumbling your words till conclude with, "Don't worry about it, that's for another time when you're older."
Thats bull. You say he was the best Running back the bills ever had. He made some mistakes and was a horrible person, but he was the best running back the bills ever had. End of story. I'm sure your honors student, overly worshiped child will understand that.