They should because this needlessly upsets the status quo and puts Taiwan at risk because it forces China to escalate so they can continue to pretend to own Taiwan.
The British Parliament didn't do this because they care about Taiwan, they did it to score brownie points at home.
The guardian is such a shit rag nowadays. It's like theyve just embraced the wing of the Labour Party that was convinced Corbyn was a communist antisemite. There is zero spine amongst the editors of the Guardian. They also are a supposed left-wing paper that regularly publishes opinions by supposed 'gender critics.'
At this point you can really only rely on the Financial Times as a vaguely left newspaper that doesn't entertain the culture war nonsense politics.