I wouldn't say it is antisemitic, nor would I say it is propaganda.
I would say that I don't think it gives a fully accurate view on certain issues. For example, the parallel between the King David Hotel bombing and a suicide bombing. As tragic as the King David Hotel bombing was and how unjustifiable it was, it must be remembered that the British were warned three times before the bombs went off to vacate the hotel and immediately after bombing, the perpetrators were condemned by the leaders at the time because the Irgun were a very small group of nutjobs.
Compare this to a suicide bombing in a restaurant for example where the target is not military, where there is no warning and where the perpetrators are lauded rather than condemned.
Thats just one example of a few I've noticed. I think its important to remember that this is simply the writer's interpretation and his own opinion and as long as it is treated as such rather than taking everything literally in what is perhaps the most complicated conflict in the world today, then it is actually very good telly!
Anti-Zionist - again not really. As Greeno corectly says the Irgun were a small group of right-wing uber-nationalists (as were the Stern Gang). The larger underground movement was the Haganah.