You can't say that screwed LSU out of a win because you still would have had to score. If it had been run back for a TD and then called incomplete you'd have a case.
Of course it didn't screw LSU out of a WIN, and there sure wasn't any guarantee LSU could have scored a touchdown. But since the refs blew the call, LSU didn't even get a chance to try, and Bama didn't get a chance to negate the interception. I'll say Bama probably would have won anyway, but for a call like that to happen - WITH REPLAY - is ridiculous.