Criticising policy? Sure. Demonizing a nation? Nope.
What's worse, BDS isn't even about Israel. It's about Jews wherever they may be.
In the USA, the Jewish community, particularly the visibly Jewish part of the community, is increasingly threatened by anti-Semitism emanating from within the African-american community.
I would say that anti-Semites like Tutu are the most dangerous sort, because the damage they cause is obscured by the celebrity and perceived moral excellence.