I Can Tolerate Anything Except The Outgroup
If it is true that US people fall into two broad tribes, the reds and blues, and the particular complex of characteristics that mark out one from the other are adopted by individuals primarily to signal their allegience to their respective tribe. So for example blues talk up bicycles because reds talk up muscle cars. Then I expect the red tribes current tendency to signal against Islam and Islamic terrorism to eventually manifest in the blue tribe wearing Osama T-shirts.
One notable characteristic of the Blue tribe is their tendency to signal an interest in communism which iconically manifests as the wearing of che t-shirts particularly when young. To understand the psychology of this you have to compare this to the red tribe who of course signal strongly against communism. One primary drivers of the red tribe is signaling its patriotism for america and its military establishment. During the cold war the US military establishment was overtly engaged in a hostile posture versus a number of rival powers that were at the time wearing communism as the official state ideology, that would be USSR and China chiefly but also Cuba and Vietnam. Consequent to this hostile posture the red tribe, to signal its patriotism, adopts a comparable attitude.
Consequent to the red tribe's signaling against communism the blue tribe is compelled to signal its difference from its nemesis tribe the reds by signaling for communism by way of defence, apology or even by outright advocation. Hence the wearing of Che T-Shirts.
The cold war however is over and has been for some time. Now the US military establishment is most visibly postured against Islamic terrorists. Consequently the Red tribe to signal its patriotism increasingly drops signaling against commies in favour of signalling against the newer trendy enemy the muslim terrorists and even muslims in general. This in turn compels the blue tribe to signal the opposite way to continue to distinguish themselves from the red tribe by signaling in defence of muslims and even their terrorists. It will only be a matter of time before the younger and more daring blue tribers will signal their allegiance to the blue tribe by wearing the portrait of an iconic Islamic terrorist, which could hardly be anyone else but the most famous Islamic terrorist of them all Osama Bin Laden, just as older blue tribers would wear Che.
I also predict that aging blue tribers will come on this thread and say this is nonsense and that they would never wear an Osama Bin Laden t-shirt the way they used to wear Che t-shirts, that it is a completely different thing.