For me, it's not right to support "armed resistance" that kills civilians and also is a franchise of a repressive regime under any circumstances. I must however recognize that it's not outside the normal democratic discourse to do so, and it happens even in the most democratic of countries. Just because Balad supports the resistance aspect of Hezbollah, doesn't mean that they are Hezbollah, but there will troublesome exchanges of ideology. I also bet that Balad supports IRA, ETA and Cuban socialism (but not the Polisario) in a similar way. What I'm trying to say is that I don't believe that Balad is an anti-Semitic party, and that there are similar political parties or factions in most parliaments in democratic countries, but I wouldn't vote for them.
As for what the political landscape would look like if the bi-national state became a reality, I think it's premature to guess, but I would suggest that there are currently a lot of Palestinians who support the PLO, far more than who support Balad. Not very reassuring.
About the poll, you just might be right with the question being misleading and not being as completely unambiguous as it is in the King's English. I suppose further polling would solve the issue.
Finally, I don't support transferring Jewish settlers back to Israel, the idea of evicting a family of one ethnicity so that another can move in isn't right under any circumstances. It's just that if the settlers stay where they are, the bi-national state is the only possible outcome. Building the settlements was a really bad idea, and now, 600,000 settlers later, demographic realities on the ground will decide the future.