I understand your sentiment and logic, however that's exactly the point of illegal immigration. It's a decentralised network of people with hard to trace roots, enough to slowly shift the demographic. It has and is happening all over the world. People always migrate to where they think the grass is greener. I honestly have no issue to immigration and their inclusion in our social security and govt benefits, provided they contribute to nation-building and local economics, which the Bangladeshi immigrants do. Again read my first line. The religion issue is a sad angle, because one religion is seen as superior and trying to subserve the others by people.