Don't take it personally. Rod speed is a pathologically insulting
regular troll in whatever group he happens to be in. Sometimes he
provides good advice, but he completely refuses to accept even
gentle correction when he's wrong.

I'll second that, he has some kind of inadequacy that he makes up for by
pretending to be a know-all in this newsgroup.

If challenged, he goes into this psycho mode of name calling, etc.

The question was why did he respond to your post, I am not sure anyone could
explain the inner workings of someone as unstable as Rod Speed.

-g