Banksy is the patron saint of the “I’m 13 and this is deep” mentality.
There are fights worth fighting: for example there are 300 million women alive who have undergone forced genital mutilation. 300 million ain't cheap change. There are also hundreds of millions of people who applauded the killing of 1200 young civilians who were enjoying life at a music festival "because it's resistance".
Applauding the killing of young unarmed civilians, genitally mutilating women and turning a blind-eye to a regime slaughtering 30 000+ of its own unarmed civilians is where I personally draw the line and consider there are maybe more important things to complain about than, say, "the patriarchal western society built by heterosexual white men" or some other woke non-sense like that.
Now to be honest Banksy did art criticizing war overall, not just war started by the west. So a generous reading could consider that he also criticizes things like the 800 000 deaths during the Hutu vs Tutsi war.
But still overall: lots of balls from western artists when it's about criticizing the west, but tiny tiny nuts when it's about, say, attacking the ideology that is responsible for 300 people enjoying music at the Bataclan and then getting slaughtered.
But these people can live with their own conscience: I speak up and I've got mine.