OK, then ~~ so answer the question ---

···why you suddenly, and with no motivation or stimulus, jumped self-defensively on to a thread on which you had not been attacked, or even mentioned, and started laying into me···

Nothing to do with sacred cows, or whoopie cushions, or icky-wickles, or whevs. It is just odd behaviour in anybody's book ~ isn't it? ~ which you really should explain. So why don't you?

~M~