Hard line stance on illegal immigrants flows back to Conservatives love to fear, hate and scapegoat anyone who does not fit in their ideal image as an average citizen. Us versus them mentality.
The British National Party under the leadership of Nick Griffin pushes hating of illegal immigrants to the extreme. The British National Party has ultra social conservative policies/views. Racism, bigotry and homophobia are in the British National Party DNA.
Conservatives have hard line views on homosexuals, women, immigrants, hippies, environmentalists and pacifists. Conservatives love to stereotype and label people. Ignorance is part of being a conservative. Conservatives love to hate and attack soft targets.
Hating of illegal immigrants is racism/prejudice. Immigrants who are asylum seekers can often a lot of benefits to a new country in regards to new business, skills, finance and culture. Illegal immigrants may well be terrorists or fugitives on the run because that is how they are depicted in Hollywood movies. Most of the illegal immigrants are innocent people without papers fleeing a brutal regime.
Illegal immigrants are willing to do any job in order to survive. They will work for lower wages and they will not complain about poor working conditions. Farms, factories and fishing industry, etc are safe harbours for illegal immigrant workers.