Unfortunately, in today‘s world facts are interpreted as ideology. Take climate change: with the given scientific consensus you don’t need to „present all sides.“ A factually correct report will present the consensus. And still, some people will take this as „ideological.“
There is no "scientific consensus" on things like the Israel-Palestine war. It's incredibly difficult to be impartial on some of this type of issues.
You could say humanism is the absolute variable good journalists could stick to, but the Guardian seems to be going beyond that, deeper into the left ideology.
I'm still a big fan, regular reader and supporter of the Guardian, but I do at times skip over some of their more openly leftist pieces.