Who are the "left wing" in this discourse exactly?
Left wing generally means a belief in taxation, equal opportunities in the form of free education and free healthcare, and more equal distribution of wealth.
Gay rights, the right to employment when you are gate and the right to not be discriminated against, like refused entry or refused service for being gayour, falls under left wing ideology because it was progressive.
"I punch Terfs" is not exactly a left wing mantra.
It's a violent male-centric comment.
Trans ideology is relatively new, and I think we are all still learning how it's own politics which are so muddled up with LGB rights actually fit in.
Personally I actually think trans politics is more right wing and regressive than they are left wing, because trans politics holds onto deeply conservative views of what being male or female is, and is inherently homophobic, a modern conversion therapy.
I believe ppl who choose to dress up and present themselves in a way they like should be free to do so, and this is pretty much what "left wing" is about, but upholding and entrenching gender roles and redefining words to mean things they don't mean is not typical of left wing politics or liberal politics at all. Punching feminists and rape / death threats are not traditionally left wing or liberal acts. They are the acts of abhorrent individuals.