Exactly. Who is refusing to "get to know" whom, who is being exclusionary? The main complaint about SOME immigrants is precisely that "they keep to their own communities and refuse to mingle socially with those outside their community". If the religion teaches not make friends with infidels, who is being exclusionary?

The whole point of visible religious signs and publicly demanding religious practices is precisely to draw a strict line between "us" and "them", remind both parties constantly of that difference,  mark the women as "off limits" to outsider males, and make it difficult for members of that religious community to mingle socially with "outsiders", so as to keep the community "pure" and distinct and prevent assimilation, the great danger.

More secular Muslims who do not wear visible signs and mingle socially with non-Muslims will be perfectly well accepted by mainstream Canadians.