I would have sent an e-mail back reading, "After much consideration, I have decided I will unkindly not remove your email from my list, and in fact will continue to send you more self righteous , hateful , vengeful and violence laden ideas. I will continue to associate with you as an individual and as I grow within my community, as an organization, and further declare my thoughts and ideology, until I receive a letter or email from you that states you understand the silly and foolish nature of your response. Furthermore, I would like you to now that 10's of 1000's of people have read your ridiculous response, as I am well know in certain circles and communities. I will elucidate on this on our next discussion"..................or something along that line.