All these guys get their fair share of hate too tbf
Probably peaked with JJJ during the FIBA debacle last year where he was getting outebounded by everyone and their mother.
Smart also heard the liability talk for years so don't think it's Rudy getting uniquely singled out for being French. Just people don't expect a historic, 4x DPOTY to be getting individually hunted from start to finish of an important playoff game.
They also don't expect his team to perform noticeably worse with him in the lineup than they did when he wasn't even suited up.
His achievements come with another level of expectation that he's yet to live up to when it really matters. It was the case in Utah and continues to be the case now too.