I agree that there's good and bad in every walk of life. I've met some obnoxious and some extremely pleasant Polish/Asian people.
I sometimes go out socialising with some Indian and Irish friends and even they say that immigration is now out of hand.
I must admit to a little wry smile to myself though when they say that these new immigrants are taking their jobs (usually driving taxis) and driving down wages
Last time I was in Prague I got talking to a local, he explained that most of the bar staff, waiters etc were actually immigrants. He said that it's because local people aren't prepared to do these low paid jobs and prefer to claim benefits.
Sounds familiar to the UK doesn't it. I really don't know the answer, it's not because benefits are too high, but that wages are too low. Also, may benefits are linked to your basic needs as a family, whereas wages don't take account of this.
However, some small businesses would not survive if they had to increase their rate of pay; on the other hand some companies who could afford to pay more do not and get the taxpayer to subsidise their wages bill.
Traditionally Governments have resolved this by topping up low wages with Family Income Supplement, Family Credit and now Tax Credits.
Ironically, it was the Tories that introduced this measure and it's the Tories that are now effectively phasing it out by cutting it, restricting it to two children and forcing employers to increase the minimum wage.