I think it is because Muslim immigration has reached a critical mass here where there are sufficient numbers for them to take over large sections of a city and be well established. We didn't start to see large mosques established until about twenty years ago after multiculturism had been established as a government policy. This sent a message that there was no need to assimulate into the broader Australian culture. There are now serious issues over the establishment of muslim schools in areas where a muslim community is not established. There is a pattern to the manner in which they establish themselves in an area. We have also accepted refugee populations from places like the Lebenon, Afghanistan, Iraq, Somalia and perhaps there is a good percentage of troubled people or those with criminal tendencies among them. Many of our more serious police cases of recent years have involved people from the Muslim community. Our policies handling illegal immigrants may push the boundries where mental health is concerned. Muslims are about 2% of the population, and so are a significant sub-culture. There are more Buddhists in Australia than Muslims and yet they don't contribute to social problems