Leclerc has been extremely fair till Austria. The FIA pretty much said do what you want to the drivers and here we go. Norris made a very aggressive move in the straight as well so is not something restricted to one driver. These are the rules now and in fact Vettel didn't get a penalty for the crash which was his fault.
Yep, Leclerc became more aggressive when Max shoved him off the track and FIA told him "suck it up kid". He's now racing as hard as FIA allows it, and in fact he's not getting penalties for what he's doing, including the move on Norris or back in Monza with Hamilton. This is why I'm boring people's ass off with the whole "stewards need to be consistent" yadda-yadda: they can't just flip-flop between severity and freedom and not have backlash for it. If they want divebombs by Ricciardo, Max passing everywhere, Leclerc aggressively defending: that's a stance. They can't, however, back out from that from time to time just because some cases generated more media presence for being in the top 3 as opposed to a 15th place battle. They either go back to 10 years ago where everything was penalized or allow racing, in which case there's no point in discussing the Ferrari incident or how Leclerc defends because that's what the FIA allows them to do.
One of the most legendary overtakes in the history of the sport (Zanardi in Laguna Seca, "The Pass") was done with 4-wheels off the track (it wasn't F1 but the point stands). Right or wrong, they had a stance back then, and they allowed drivers to race based on those indications. Right now in F1 one race they're telling us that a minor unintentional cut that could have resulted in a crash (Canada) is not okay. That pushing off your opponent in the last lap to win (Austria) is okay. That defending without leaving enough room on the track (Monza) is okay. That hitting the rear tire of a car in an overtaking attempt (Brazil) is not okay. That changing your line while defending on a straight is okay (Brazil). They just gotta make up their fucking mind about what can be done and what can't be done, then even the fans would be a lot more calm in discussing incidents. But not even the FIA is consistent, so how could drivers or fans be?