Yes., Biden was wrong. There's no other way to spin that. He said this wasn't going to happen and then it happened. That's called "being wrong" here in reality. That's exactly what happened. The people telling him that were exactly right. Did you mean the opposite of what you wrote? Because it would not have been mobbed by the huge crowds that we saw running around the tarmac (and jumping on / in the landing gear of aircraft) and pressing in around the gates, which was what allowed the suicide bomber to succeed.