There are two John Cenas.
One John Cena is the guy who, depending on who you talk to, actively buries young talent he doesn't like and changes the finish of matches so he looks extra strong in victory. And even if that part isn't true, he has said that if younger guys like Rusev, Bray Wyatt and now, probably, Baron Corbin never recover from losing their feuds to him, that it's their own fault for not working hard enough, and that's kind of a jerky thing to say.
But there's also another John Cena, and it's the guy who has set the record for most Make-A-Wish grantings, and becoming a lot of people's hero in the process.
That's the John Cena you can see in the video at the top of the page or just below:
I wish that John Cena would talk to the other John Cena, get him to not be such a sanctimonious jerk all the time, but I guess we have to accept our heroes, flaws and all.