The NF linked other political themes to race and immigration, and targeted concerns among the white British population about immigrants being competition for jobs, housing, and welfare. Among the "standard forms of NF propaganda" was the claim that immigrants carried diseases like leprosy and tuberculosis, that they placed a heavy burden on the National Health Service (NHS), and that incompetent and poorly trained migrant staff were detrimental to the NHS. It maintained that school quality was eroded by black pupils, that the employment of black workers left many whites unemployed, and that blacks were a source of crime. It claimed that immigrants evaded taxes, and that they were arrogant, aggressive, and unhygienic in the workplace. This anti-immigrant discourse was similar to that employed against Ashkenazi Jewish migrants in the late 19th century and also echoed the response to gypsies and Huguenots in 17th-century England.