What a stupid idea. He says he wants to repeal the laws so that employers can choose to employ a British person over a Polish person. (note he chose a white example!) They already can. There is no law to say if a foreign person applies for a job, you have to employ them. You go right ahead and hire the best person who applied. The laws just stop you saying 'no blacks or Irish', or not giving someone a job because of their nationality/ethnicity/etc. Why on earth would you argue that it's unfair to stop someone doing that?
The issue that people complain about, about certain groups of immigrants driving down wages and conditions in sectors such as agriculture because they are willing to accept less, may be valid. This will do absolutely nothing to address it though! You'd have to make it illegal to employ non-British people. Maybe that's his eventual plan.
Also does he really believe that it wouldn't be a problem any more, that minorities don't need protection these days like they did 'forty years ago'? He can't honestly believe that. He just doesn't care.
Racist, misogynist and stupid.