Two wrongs don't make a right. Both Verstappen and Norris were in the wrong and of the two Norris was clearly the one gaining a bigger advantage from his wrong, gaining a position VS maintaining a position.

• If you penalize neither driver then Norris gains an advantage.
• If you penalize just Verstappen Norris gains an even bigger advantage.
• If you penalize Norris he gets a disadvantage with his advantage.
• If you penalize both then it's as if nobody got penalized.
• If you penalize both but Norris more severely you get the same outcome as if you've penalized only Norris.

You might not like it but Norris deserved that penalty, what he did was against the rules. What Norris should've done is give the position back and try to get a penalty for Max for pushing Norris off the track.

Edit: seems like a lot of people are letting their objectivity be clouded by their dislike of Max. Ask yourself, if the roles were reversed, would you be making the same arguments? Would you also argue that Max overtaking offytrack shouldn't be penalized or that Lando pushing Max off track should be penalized? To me the drivers don't matter, whoever took a position off track should be penalized first. If they had given the position back the driver pushing off track should be penalized. Penalizing both equally means nobody got penalized and one driver got away with an unfair overtake.