Crap move, but whatever at this stage. If the fans start turning negative during games, it won't help anything. The best thing people can do is support the team and hope for the best, or at least give them a chance. Booing and being hostile at this stage would be completely counterproductive.
Especially with PG, it didn't go unnoticed that he waived his trade kicker. He must have wanted out of Philly, and that fan base had become pretty toxic. Replicating that here won't help anyone.
I'm expecting fans to boo the @#$% out of PG13...the fanbase will hate him. He's replacing a favorite son, everyone thinks he's a terrible return, his production these days, since he's a complementary player, more matches a $20-25m player than a $58m one, plus all his off court issues like the drugs and dumping Doc's daughter for a stripper who was his baby mama (who at least he married). I don't know if anyone could start off on the wronger foot in Boston

It kind of reminds me of all the criticism Gordon Hayward got when he came back from his injury and was getting paid a max and everyone was criticizing him because he wasn't scoring "at the level we expect a max player to score", and was losing out to the likes of Mook and the Jays. I'm expecting much the same criticism when people see his production isn't matching that of Jaylen, advance stats be [dang]ed. That's much the same criticism that the Sixers had of him, when he was getting outscored by the likes of Maxey and VJ (who, it must be said, were trying to get paid and fill up the box score).