Agreed, and those were horrible. The whole point of having him on the team is for his basketball IQ. If he doesn't have that, Beno might as well be out there increasing his trade value.
He probably was, but that ain't saying much. He lazily went under a screen and gave Gibson an uncontested jumper at the foul line to drop the lead to 14. He spotted up behind the three point line, got the pass with 4 on the clock and passed up the uncontested shot to dribble into the defender and force a 20 footer that got blocked and turned into Lebron's three point play on the other end. He threw a bad pass to Duncan that was almost stolen, he almost lost his dribble at the top of the key and then he got away with a travel on that huge layup off the glass. That said, Parker should have probably had three extra assists for those shots that rimmed out on Duncan.
Duncan and Parker had plenty of things they did right, and what they did wrong almost cost them the game. There's not much solace to be taken in playing well and losing.
Manu tried a quick three at the beginning of the run, committed the turnover right before Lebron's missed layup and shot a contested fadeaway from 20 feet before Lebron's big turnover. He then hit the three and got fouled. Just because the Cavs weren't able to capitalize off the mistakes doesn't make them excusable.