Frankly, if the UK constitution is that easily destabilised then perhaps we need to take a different look at the way things are run. (I've long believed that we do). If anyone's destabilised our democracy in recent times it's Boris Johnson and his prorogation of parliament to suit his own political ends.
@bombastix upthread gives one of the many good reasons why:
This means that the UK is an "elective dictatorship" in the sense that whoever wins with a big enough majority is given everything at their disposal for around five years when the law says that there is another go at deciding who is in charge.
This, and an unelected upper house.
As to Jess Phillips, especially given her previous championing of women's rights and drawing attention to the large numbers murdered at the hands of men, people will be disappointed in the way she voted and are entitled to say so. The optics are horrendous, whatever justification she gives as to the way the whole issue has been handled and the level at which she believes inquiries should have taken place. Personally, I agree. What's worse: allowing huge rings of sexual traffickers and abusers to have their behaviour (again) rugswept, or sending the message that the UK has allowed its politics to be swayed by an influential, American bigmouth? As far as I'm concerned that one's a no-brainer.
But calling her a 'genocidal rape apologist' is another thing entirely - the first word in particular is horrendous and deliberately incendiary. There is no need for it whatsoever. This woman has had enough issues with her personal safety in the past, without elevating these again on the whim of a powerful American who, as she rightly says, is going way over his remit. And I find it interesting, as always, that it's a woman first and foremost who has, yet again, been pushed into the firing line. Interesting that he didn't choose to make similar examples of the many male MPs who also voted 'no'.
Add in a couple of misogynistic slurs for good measure - it's a US right-winger we are talking about after all. Incidentally, Musk's own track record as to allegations of inappropriate sexual conduct hardly put him in the strongest position to throw around slurs of that kind.
Rule #1 of misogyny: 'women are responsible for what men do'.