The frightening (and fatal) reality is that they are allowed to use our laws and rights (intended for citizens) against us, while most sleep, or are complicit out of ignorance, unaware that the war has actually begun.
A big mistake by communist enthusiasts was to declare that Communist heaven is just around the corner. They got carried away, but it was understandable, because the “scientific Marxism/Leninism” had economic advantages of the socialist system over the capitalism as its cornerstone. Fortunately, it is a measurable, verifiable, falsifiable claim. As soon as the Iron Curtain began leaking and the comparing became possible, it became impossible to cover it up for too long. The king had no clothes.
Islam makes no such claims. All rewards are in heaven, and nobody comes back to disprove any claims.
So, while the shear industrial power of Islamism is indeed not as comparable as Germany and Japan and later USSR, the absence of restrains combined with technological advances and openness of the current world makes them a very dangerous enemy.