Still doesn't make you right about 1 game... FIGC and others have been talking for a few years now about the referees being respected and punishing players for swearing at refs, confronting refs, and so on.
What Higuain did was disrespectful and childish, and the comments made after by Sarri and others are reprehensible as well.
According to FIGC's own standards of incidents with the ref this year, Higuain clearly deserves a 3 match ban. It's not even really debatable. He pushed the ref (however lightly), he confronted the player he fouled, he had to be dragged off the pitch by his teammates as he was refusing to leave.
Juve player does this, it's the rest of the season.