Zionists against democracy

I've been looking around the net and the campaign against the AUT on account of its Israel boycott is getting quite bitter. Perhaps I'm naive but zionists are calling on people to resign from the union over this. There have even been resignations from the union already, and it surprises me. I can understand the campaign of media lies, distortions and character attacks and I expected it. Look at the Jerusalem Post article linked above. It accuses the AUT of deliberately holding the conference at Passover to exclude Jews. But after all this talk of freedom, justice, democracy and learning, people are leaving a democratic association because they disagree with a majority decision. I'm thinking of the conference before this one when the boycott motion was defeated; I don't remember any anti-zionists leaving the union over it. They argued their points honestly and openly and then accepted a democratic result; then and now.