There is no need for you to reflexively turn defensive. From what you say, although you and I may have our differences, we are in broad agreement. I was not talking about leftists like you and Pleepleus when I criticized the 'left'. I was talking about the extreme left. And yes, I am critical of the extreme 'right' too, but more so of the extreme left. Let me explain why:
Yes, the extreme right too made and continues to make mistakes but at least they are on OUR side. They want what's best for Israel and the Jewish people. Unfortunately though, as the saying goes, the road to hell is paved with good intentions and many of the things (not everything), brings harm to Israel.
The extreme left on the other hand has completely gone over to the other side. They don't profess to be Jewish and they certainly don't consider themselves Zionists. The only thing that is important to them is their leftist ideology. Moreover, they have strong connections with other international leftist organisations and collectively they set out to harm the state of Israel. They espouse the one state solution and they call the present day Israel apartheid. Even though some of them too I believe are motivated by good intentions, who are idealists and are committed to creating perfect societies, they do immense harm to Israel because their solutions would never work. Believe me, if I thought that they would, I would support them. But there have been too many Rwandas, Zimbabwes, Lebanons, Yugoslavias and other places that showed us where their solutions lead to. Yet they tirelessly promote their discredited theories to the world. So how can we expect non Israelis, non Jews, who are also leftists, to be less extreme than they are? That's why they do more harm to Israel. Because they are much better organised and connected to the rest of the world than the extreme rightists.
Like I said sharonbn, if you don't believe me, then go and read the +972 magazine. You will find their misguided idealism as well as a lot of malice there against Israel. I am not saying that all of them there are lunatics or that all of them are malicious. But too many of them are that exactly ...
Oh, and I nearly forgot to add: The extreme leftists that I am talking about, never (yes I said never) criticize the other side. Not Hamas, not Hezbollah, not Iran, not even terrorists who deliberately butcher Israeli children. They always end up blaming Israel for everything.