I thought that the fact you said 'all immigrants should be executed or deported' is a reasonable self-explanation.
I also highly doubt you are a descendant of William the Conqueror. Then again, we have very different views on what constitutes to what makes someone part of a national identity.
National identity is subjective and is all for interpretation. I believe your definition is by blood, my definition is be the endorsement of culture, upbringing, place of birth and language. There are immigrants who have come into this country and work and graft, in some cases, more-so then British-born counterparts.
Your outlook and perspective on nationality and your thoughts on how it should be handled is cancerous. It wouldn't surprise me that you're a BNP or to an extent, EDL supporter.