I don't think anyone disagrees that this was a stupid move and something that shouldn't be done. Maybe whether he had any points or not is immaterial.
I recall LCol Taylor blasting the CAF in a resignation letter. I recall her being lauded as a hero for it both in person and online. (I'm certainly stand behind her comments, though I've seen people charged for much less).
Genuine question, completely different situation?
Yes.
At the time of her release, LCol Taylor was a member of the Reserve Force, not the Reg Force, and, to my recollection, did not issue the letter to the public; rather, she sent it to her CoC (and certain others she knew and respected in the military) and it was later leaked to the media, not by her.
NDA 60 dictates who is subject to the CSD, and when. Simplified, for the Reg F, it's always; for the Res F, there are a set of conditions, one of which must be satisfied.
So a few examples: a Res F member in uniform? Subject to the CSD (60(c)(ii)). Present on a base? Subject to the CSD (60(c)(viii)). Standing on Parliament Hill, watching the changing of the guard? Subject to the CSD (60(c)(x)).
So even if this Artillery major is Res F, not Reg F, by presenting himself in uniform he has created the conditions necessary to be subject to the CSD.
And NDA 60(2), which I allude to above, states, again simplified, that if you were subject to the CSD when you committed an act, you remain liable to be charged, dealt with and tried for that offence, even if you're no longer covered by the CSD at the time charges are laid and the trial proceeds.