Well, I wouldn't clean the whole kitchen (though that's what she probably expected of you -

) and I would have a talk with her - if possible, or a texting 'campaign'
I think partly her text could be WAY better worded, and partly that maybe you did have an extreme reaction to it. And I know it's just a reaction, it is what it is... ((hugz))

It obviously 'pushed a big button'... She probably didn't exactly intend to push you that far, just wanted a clean kitchen (and was too lazy/'busy' to do it herself, at least her part!) People also sometimes have lousy communication styles or don't know that sarcasm doesn't go across well.
I'm in no way trying to 'excuse' her behaviour, just trying to provide alternative ways of looking at it, based on my own experiences when sometimes good people communicated poorly and got me upset. If that makes sense?
It depends if you're otherwise okay with your roommate or not, were you just roommates for 3 weeks? Some people can be self-absorbed and not notice important things or can be clueless about illness if you 'look good'-ish. Does she have any previous experience with people with chronic illness so severe?
It depends if you want to give her a 'second chance' or look for a new roommate (if that's an option?) but I wouldn't totally give up on her just based on one text. I'd have a serious discussion (or texting) about the stuff you've told us here, how you help run an important campaign and that it's stressful and you relax by knitting, or something like that?
Maybe she's not into politics or politics is not important to her? What *is* important to her - maybe you can link it to her goals? Maybe she didn't know what all it encompasses (as you've told on the other thread, it's quite a lot!)
So I'd give her a benefit of a doubt. But if she pulls such stuff on you after you've had a serious discussion/texting, then maybe it would be good to explore other options, look for new roommates...
Too sleepy to know if the above makes sense, just know that we're on your side and that hopefully you two can work this out or find a better roommate! ((hugz))