Biden is not encouraging Israel to take military action against Iran.  He is saying that is not the US path and he believes Israel’s path is the same as that of the US.  However, just like the settlements issue it is the Israeli’s who need to make the decision to cooperate with us.  It would not be called cooperation if it was based on coercion. 

I am fairly certain the US will view Israeli military action against Iran with about the same level of support it has expressed toward Iranian leadership regarding its post election violence.  This isn’t the way to fix the problems, but only add to them.  Today, we seek a higher level of understanding and cooperation today that doesn’t depend on the old paradigms but new paradigms that recognizes that everything that adds to the hate, fear and anger of others increases instead of decreases these conflicts.