Charles Oakley says Devin Booker was right to get pissed off about the Toronto Raptors mascot's free throw antics ... telling TMZ Sports the dino was crossing the line.
We spoke with Oak about the Phoenix Suns star's ongoing feud with mascots across the league ... and he says the 25-year-old should be left alone -- especially when fans aren't in the stands.
Of course, Oakley is referring to when Booker called on officials to move the Raptor from underneath the basket while at the charity stripe last week .