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Don't try to reason.... it's pointless. He'll just keeping using strawman arguments until it degrades into someone backhanded remark hinting that you're a bootlicker. Rinse.... repeat..... like a scorned ex wife.
The problem with not saying anything against insanity like this is that people equate the lack of opposition to agreement, then they start to agree. Its how communism, socialism, and many other dehumanizing ideas grow and fester. Because those who spread those ideas say it enough that people get tired of arguing against it.