I feel for you, JWIP. These JW Jihadists really put a lot of effort into "appearing" intimidating. But there is an easy way to fire back.
In my case, in speaking with several elders (some of which were COs and anointed) over my issues with the Society, a couple of well-placed questions absolutely baffled them. They stammer as if you had just whacked them in the face, then in the middle of this befuddlement they become embarrassed. This in turn quickly evolves into humiliation and then anger and hostility towards you, the one who just destroyed their schoolyard logic with a simple question. All of this happens within a few minutes.
A key is to never lose your cool. Remain collected and level while they wallow in their defeat.
Trust me. They will leave you alone, but only while they are plotting your demise and slandering your name to every JW they meet.
Still, the tactic has never failed. It works every time. You will never feel "stupid" again.