You can be an anarchist and still understand the system we currently live in.
Recognising a people are being genocided and should be given legitimacy on the world stage, to help protect themselves, to get aid that they couldn't unless they're a nation state, is more anarchist than always living in the theoretical, hoped for, future world.
Eventually, yes, borders should get to fuck. But we don't live in that world yet. Right now Israel is killing Palestinians in droves.
Might Is Right is less anarchist than borders.
Being anti genocide is more anarchist than being anti borders.
If you have a vote in the English/Welsh Greens leadership election vote for Polanski then.
He's stated a willingness to work with this new party so they don't put forward candidates in the same seats and compete with each other. The other candidates have done no such thing and are greedily and delusionally running on the idea that they can convince enough people to vote Green that the Green party will be able to enact change on its own.
Labour are not left wing, that is evident from the last year.
The Lib Dems are not left wing and will sell their principles for a whiff of power.
A Polanski led Green Party working in tandem with the Corbyn/Sultana party (and possibly the SNP and Scottish Greens) is the only hope I see of the left enacting any serious change. One of the most important of which being proportional representation.