I worry this would strain our relationship with the UK, and especially after likely pissing off France we might want to hold back on that. I'd like to hear from the SoS.
Well sometimes you're bound to piss off an ally. I'm sure you had an argument with your parents too someday (or with your partner). This isn't a declaration of war or something, it's an opinion.
Out of context: Trump did piss off Europe multiple times esp. Germany, we're still part of NATO and America is doing the bulk of the work in Ukraine in terms of aid.
I really don't think this is a major deal, esp. since IRL there is also criticizing of the UK based on this, not by governments but by organisations. But IMO governments should grow a backbone and not vote or take positions based on "who they're allied with".
This is definitely ethically the right position, and we should stand by it. It's a resolution, it doesn't do anything.
Turkey is also an ally within NATO. And many within NATO pissed them off for considering the Armenian genocide a genocide, or by considering occupation of Turkish Cyprus occupation. It's not unheard off...