Ah, I understand. I can better explain - so I worked with kids in the past (Guides, Scouts, teaching, before stepping back to focus on my own) and did find that non-confrontational methods worked best with kids displaying negative behaviours, whether ND or NT. Obviously if they are doing something dangerous you step in immediately, but I tended to find that backing off, given them space to calm down, and then opening a discussion (how are you feeling now?) always seemed to bring them over more quickly than balling them out for being rude and disrespectful.
The issue here (as I understand it) was the nature and cause of the argument rather than the parenting style in the face of an aggressive outburst - ie the Sc ruling (anything trans related) being something so deeply triggering and distressing for the young person concerned, which is why I drew on my experience with my teen. It has taken years to work out that in this particular circumstance, on this very heated issue and regardless of whether they are ND or NT, you have to accept that it is deeply emotive issue and focus on this (the why, the how to support them in navigating their distress) rather than obsess and rant at them for disrespecting you (which they clearly have). The OP said at the start that her child had left, stormed out and a parent’s fear at that stage is whether they will come back, whether the relationship has been severed.
When they have finally calmed down and returned, it’s a relief, and you just don’t pick the shouting/ranting as the issue you tackle - only to start a new fight by telling them off. You start building a bridge to reconnect so that you can help them manage their distress and avoid a recurrence. Later, often days later, I personally might mention that I was really hurt by the way they spoke to me, but for years I had to bank that and focus on getting my child to that good space. And yes, it did feel like I was in an emotionally abusive relationship where my not giving in might lead to self harming or worse. My child was never directly aggressively abusive, but they coerced and manipulated with the threat of suicide and self harm which, as many DV survivors will tell you, is obviously a form of abuse.
The distress that OP experienced will have been visceral. The fear that she might have lost her child because she dared engage with the topic or didn’t change the News channel quickly enough to avert the whole incident in the first place, will have been gut-wrenching. Those are the eggshells you tiptoe on as a parent of a child navigating this issue, these identity confusions. So in these circumstances, regardless of whether they are ND/NT, and especially because of the loaded nature of the exchange, yes I would always go for de-escalation, even if that means letting go of my pique at the way I have been spoken to during a row.