As far as I am aware, one of the basic principles of Islam is that one should avoid vanity, to we of the west, the sight of men with beards and baggy trousers may amuse us, (or put bluntly, cause us to take the piss).
To the person thus adorned, it is a simple matter of dressing in the most simple and practical manner suited to their lifestyle and in accordance with their beliefs.
Women are not regarded as objects of desire, nor do they wish to flaunt their femininity and dress accordingly, fashion is not of paramount importance to them, they are subservient to their husbands and devote their lives to the service of their families, which is also according to their beliefs.
The most pious of the followers of Islam CHOOSE to wear the burka as a commitment to their beliefs, they are not a source of ridicule, they should be respected for their devotion.
Just as we would reject their dress codes and lifestyles, they are equally entitled to reject ours.
Many of the conflicts we are witnessing in several parts of the world today are a direct result of our attempts to influence other nations to adopt our principals.
The main difference is that they do not laugh and (take the piss) out of us, the Lord knows, judging by some of the comments on this forum, they could hardly be blamed if they did so.
The question of integration into our society is an entirely seperate issue, as long as our friends from abroad obey our laws and respect our culture, we should respect theirs.
Perhaps that is the area in which most conflicts occur at home.