Why waste your time?
He (they) will never concede to any argument that damages their defense. Facts mean nothing to them. They will demand that you explain something irrelevant with a fine tooth comb but they will not let you scrutinize their position in the same manner.
If you try to question them on any factual data that detracts from their party line; they will completely ignore the question and proceed to accuse you of paranoia, mental illness, stupidity, and cyber stalking.
We have seen this behavior before. The whole anti-nss argument falls apart when someone mentions facts and fails. They completely ignore all facts and pretend that fails don’t exist because there is absolutely no way to win an argument once data that supports our position is displayed for all to see.