Political situations vary from nation to nation. But in the U.S. I would think any leftist, whether or not personally pacificist, would want to encourage any principles consistent pacifist movement that showed any traction at all in this extremely violent nation. I mean a genuinely Pacificist member of congress, not just one who claimed to be Pacifist in their heart of hearts, but consistently voted against military budgets, military intervention, military aid to other nations (Including) Israel, who spoke out against violence by all nations - including the U.S. and Israel. Even if they also criticized popular movements in other nations who use violence in defence of themselves and their rights - they would constitute an immense improvement over our current politicians, and a genuinely progressive voice (assuming they were equally progressive on justice as well as peace issues). For example if I could replace the truly dreadful Brian Baird (my Congress Critter) with a sincere and consistent F.O.R. member I'd do it in a heartbeat.