That’s just false, but no, it is rare to be killed for attacking the teachings of their caliphs and prophets. Most often, this usually appears in nations with Sharia Law, the same way as it used to previously happen in the Holy Roman Empire, the Byzantine Empire, and far more. It’s not the only place it happens, it’s more prevalent because their fundamentalists are more prevalent. Every religion and culture can have more or less radical strains of itself, the less radical ones are winning in Christian nations while the more radical ones win in Muslim nations. Christianity and Judaism have much of these same violent threats, they prophesy of their opposition being struck down, often being interpreted by their own followers as a call to commit religious violence. They’re not the only ones, I won’t defend Islam, but I’m definitely going to set them straight. I get it, many religions have a higher concentration of violence or violent threats in their text, but this is nothing new, the other religions are not immune, and Islam is not the most violent in history if we must look into their beliefs and values.