Osama's Ocean Swim

Alright, listen up, genius! So, this joke is saying Osama Bin Laden got a swim in the ocean, right? And then it's like, who helped him get there? Well, it's implying that the people who destroyed the Twin Towers are the ones who sent him swimming. See, it's funny because, well, you probably wouldn't get it, but some people think it's karma, and you think that 2+2 = 5.