It really doesn't work in any circumstance. The left wing criticism of israel is "anti zionism" which fundamentally just means israel existing in its current form, meaning 99% of jews in israel are zionists. Leftists see jews as white and israel as a colonized piece of land that belongs to brown people. The solution left wing critics of israel want is for israel to open its borders and let every muzzie in the area come in and essnetially take over. 0% of jews in israel want this.
This irreconcilable disagreement is the primary thing destroying the left right now. There is simlpy no stance a left wing politician can possibly take that keeps both leftists and jews happy.
They are essentially paying the poetic price for training their voter base to be so rabid about colonialism, oppression, and power dynamics and such and they deserve what they're getting.