Nobody decent should support the actions of the Israelis or the Palestinians over the past few decades. However, given the current Palestinian 'quality of life' and quality of leadership (none), I can somewhat understand their rather pathetic and sporadic acts of violence, but given the average Israeli's education, 'quality of life', freedom of movement, relative control over their own destiny, their disruptive use of 'settlements' to further diminish any Palestinian land ownership, access to basic necessities, possession and use of modern weaponry, I DO NOT give them a 'free pass' on their highly disproportionate response to any attack.
Oh, and I am definitely not part of the 'far left', but then again I don't know how you define 'far left'
PS Don't forget one of the most lethal terrorist attacks in the 20th century was carried out by Jews against the British. In fact more Brits were killed, in that one terrorist attack, than the total Israeli's killed by Palestinian terrorist attacks over the past 9 years.