Western society is "western" by virtue of sharing common bedrock values, some so basic it never occurred to anyone to actually become aware of them in so many words, just as fish aren't aware of living in water until they are taken out of it. It is composed of many national cultures that differ on less basic aspects. 

It is only in comparison with traditional Muslim societies for example that we recognize what we have taken for granted, that men and women should interact socially in public and social space, which is not an assumption shared by Islam. 

Many Muslims have "westernised" and "secularised" and dropped that assumption, many have moved here to escape their societies which still cling to it. 

It is our right as members of Canadian society to object to mass immigration of those with basically incompatible assumptions about what a good society should be like. That is committing cultural suicide.