This is an incorrect statement
The Muslim immigrants in the United States, tend to be on a higher economic scale (Higher education, Professionals, Doctors, Engineers, Business Owners). The Muslim immigrants in western Europe are on a lower economic scale, they are usually disenfranchise, live in ghettos and come from former European colony from Africa and the middle east, and the Jihadist use this type of disenfranchisement to gain all type of support. You don't see Muslims rioting hear like you do in western Europe.
Also several Islamist inspired lone wolf attacks, does not compare to the large scale coordinate attacks we see in Western Europe. If you mentioning the several lone wolf inspired attacks from the past 10 years you have to also involved other demographics (white boys in theaters and churches), which is 10 times as much, here in Miami there's always some dude shooting up a basketball court with an AK-47 on a weekly basis.