If Vanunu still poses a risk, then so does the treasonous Pollard, who, by all rights, should have been executed. If you don't release Vanunu, then you have absolutely no right whatsoever to demand the release of one of the most notorious traitors in US history. It's that simple.
5 wounded Syrians rushed to northern Israeli hospital (Haaretz)
from the article: Israel claims nuclear whistle-blower Vanunu still a security threat