Charles Barkley didn’t hold back. Before the NBA season tipped off Tuesday night, he ripped the 16 teams that passed on Dalton Knecht in the first round of the NBA Draft back in June. “These NBA general managers don’t have any idea what they’re doing,” Barkley said on TNT’s coverage of the league’s opening night, which featured the defending champion Boston Celtics hosting the New York Knicks and the Minnesota Timberwolves. “Letting the Lakers get Dalton Knecht was one of the stupidest things I’ve ever seen. That’s a bad boy right there. Dalton Knecht. Remember that name, y’all.” Knecht entere…