Call it a delicate balance of diplomacy, or a dance between two apparently opposing sides.  The Obama Shuffle involves first a sway to the left then a sway to the right, one step forward, then one step back.  And hop, hop, hop hop hop.  And stop.  (Now you try!) The past 72 hours have shown that the US President is not afraid of engaging in some verbal warfare, depending on who is listening.  While condemning the Nakba Day’s pedestrian infiltration of Israel, he promoted (as Israel views it) a retreat to “indefensible” borders.  While calling for a return to negotiations…