I think I remember reading that some leader of the Danish Nazi party got kicked out from the party because he married a Christian Palestinian woman. He constantly tried to defend himself with her "being a white Middle Easterner".
Immigrant does convey the criminality of those its describing so it is natural to use it for blacks etc as describing them as foreigners or migrants would chaff with their criminal mentality. I think any so called 'immigrant' who objects tobeing classified as a migrant or foreigner a terrorist.