The issue is as many sensible PP’s have mentioned - that instead of the tweet discussing consent and the dangers of choking (or any breath play) they are candidly stating that pressure on the corotid artery is “safe”.
It is demonstrably not safe.
If two consenting adults in a loving relationship enjoy BDSM or S&M then it is for them to establish their own boundaries and accept that they are (with breath play) adding an element of fatal risk to their sex life. I don’t think this makes anybody who practices this as correctly as they can “damaged” or abuser/abused. In fact BDSM take the rules of their sphere very seriously and within those rules are clear and defined terms of consent.
Now onto the issue of normalising choking. It is horrible that this has become another example of violence against women (and men but less so in pornography as far as I understand) who do not want to take part in it. That young boys use pornography as an educational tool is an unfortunate fact of our society at present. We are the first to have to deal with this issue on such a wide and freely accessible scale and that is frightening. If my DD or DS decide they have a sexual ‘kink’ later in life - rather than decrying it as incorrect, I would try my best to educate myself and them on what the risks are. First and foremost that is my job as their Mum, as I can’t control what they choose to do in life, I can only hope to educate them and instil a decent moral compass and the strength to say ‘no’ within them.
I will add that calling people with a particular sexual predilection any sort of derogatory term is singularly unhelpful as we should be learning from each other. If my DH were to decide he would like to try any type of BDSM play (unlikely as we aren’t really into that side of things) the first person I would ask for advice would be my good friend who moonlighted as a dominatrix for many years.
All this I say as a woman who has survived abuse from a Male and Female relationship and have never been interested in choking or harsh rough intercourse. But there is a difference between debating if something should or should not be normalised and shaming posters who practice the act in question in as safe an environment as they can.