This is the correct answer. “If they consider themselves as observant and strict, then YES they are dangerous, without question. I have met many Muslims who were not so literally or methodically observant, who were ready and willing to assimulate.
I have had good business transactions with that type of Muslim. Just be pleasant, and polite to everybody, is my motto. Or at least non-intrusive.
Some of my doctors and dentists have been of that religion.
When I suspect they are of that heritage or adopted faith, I always take the precaution NOT to bring certain issues up that would be most likely to spark a disagreement. I’m usually not in their presence to discuss politics anyway.