You may call it BS but you can offer nothing to counter it and that's because most of the crap written about immigration is based on myth.
Far from being a burden on this country, immigration is essential. The UK birthrate (1.64 the lowest since records began) which means that immigration, especially skilled immigration, is essential simply to keep the working age population stable. Without immigration the NHS for example would grind to a halt.
A third of all doctors gained their qualifications abroad.
A quarter of all nurses were born abroad. (half in london)
A fifth of all elderly carers were born abroad.
study after study has shown the myths around immigration to be totally without foundation. For example a study by the low pay commission found in the period of 1997 and 2005
http://www.lowpay.gov.uk/lowpay/research/pdf/t0Z96GJX.pdf
But of course, you are not actually interested in the facts are you?