I don't think we have the same definition of the word "leftist".
Many, many LGBTQ+ people have taken measures to defend themselves and loved ones. In fact, more than one has gone on the offense and committed highly-publicized ideological homicide.
I could not personally say where on the spectrum are narcos and cartel members, but the way they are supported and abetted by leftists while also being heavily armed and well-versed, they are full-throated 2A supporters by any measure.
It is perfectly typical, and understandable, for any marginalized group to resort to weapons and self-defense techniques, and it is also logical for their backlash and rage to be so great that it goes beyond defense. This will only increase over time in the United States, and elsewhere.