I wonder how this compares to other countries when you use the same broader definition. The article only compared it to overall US unemployment which is useless to be honest.
Topics can be forbidden while still allowing for a free society. It's called the paradox of tolerance and is why Germany bans the free speech of Nazis. The thing about satire of Islam is that the events that get a big reaction like this are not "making fun of Muslims and Islam" but flat-out hate speech. Look at real political cartoonists like Eli Valley and Stan Kelly to see that you can joke about and even be kind of mean to people without calling them pedophiles or burning sacred books. You say that Islam hasn't had time to become compatible with modern society. What a ridiculous statement contradicted by your own exception. The rise of American Christian fascism as well as the arch-conservative Christians in modern-day Uganda prove that time has nothing to do with how strict a religion is. This is further contradicted by Islamic society being much more progressive in the Medieval era compared to Christian society despite being younger. The fact is, you just hate Muslims.
Actually there may very well have been news about a public Torah burning, considering the rise in anti-Semitism across the world has a lot of people worried. And a bible burning could easily go viral on Christian nationalist social media and news stations across America.
Why do you want to burn religious texts so much?