My statement was that "Islam" has virtually no influence on Europe culture. First of all, that doesn't include everything a Muslim does, for me, Islam is a religion with values and rules.
The mere existence of Muslims following their own cultures in Europe does not constitute an influence in its own. Not even when they interact with other Europeans. Influence on European Culture would mean that Europeans change to adapt to Islamic beliefs. Which they largely don't, except sometimes in very negative ways.
You probably overestimate population trends... Yes, the Muslim population will increase, but not without bounds and much less than some people seem to believe...