The old and new Muslims in the West represent a change that some narrow-minded and bigoted Jews and Christians view with certain irrational fear. Phobia and ethno-centric arrogance were two sides of the same coin. If Muslims were not toeing and imitating post-Christian and post-modern cultural norms, then they were threat to Judeo-Christian western civilization. Perhaps, there was also a subconscious sense of envy or inferiority that while they had long given up their common Abrahamic habits and culture of modesty and dignity, why should Muslims be sticking to theirs. This stark contrast served also, in a way, to saying to them that ‘the emperor had no clothes’.
This may probably hurt, but if it does, the best way to alleviate any such feeling of injury is simply to get ‘dressed up’ instead of blaming Muslim for not ‘modernizing’.