The reason you can think that is that you are in a society where the threat of right-wing radicalization is real, but not Islamic radicalization. If you lived in a Muslim-majority country, you would see that Islamic radicalization is far more dangerous.

Don't forget that even as WWII garnered many atrocities, one of the goals is in reviving the caliphate, a religio-political entity that has had a very real presence as a political institution in the past, that had been able to unite squabbling desert tribes into a powerful entity that had been able to defeat two ancient and prestigious empires—both the Persian Empire and the Eastern Roman Empire.