Which is why it's futile to lable something a religion or cult. In reality, the phrase 'Islam' is just an identifier for a philosophy that is antithetical to the West.
We didn't need to know why the Japanese/Nazis hated us during WWII, and we certainly didn't care whether or not their religions (Shinto/Pagan) were cults.
Personally, I do not care what someone believes.
I care a lot about their actions, particularly if they involve me and high explosives.