Specifically , Israel is the root cause of widespread bloodshed in the Middle East, yes, ranging from the localised wars with its neighbors through various Palestinian resistance groups and all the way up to bin Laden and the felling of the World Trade Centre- which in turn led to the invasion of Afghanistan. Israel then pushed for the invasion of Iraq which was followed by the invasion of another anti-Zionist state, Libya.
It should be clear to everybody that Israel is now pushing for war on Iran- at America's expense.
Israel was the terrorist state from the outset. The Nakba produced the millions of refugees housed in camps throughout the Middle East today- all hotbeds of dissent- and Israel's continuing defiance of justice in terms of international law - a defiance supported by successive AIPAC-led US governments - enables terrorist groups to recruit .
There won't be any decrease in resistance to Zionism until the US supports the Palestinian state. You can't bomb justice into submission, nor assassinate it- and Palestine has world-wide support which grows every day with every new Iaraeli and Israeli-led atrocity.
So Israel is the cause, yes, but the continuation of dissent and violence can be laid at the door of ' the West's ' support for it.