NEW: Dozens of Israeli soldiers from the Givati Brigade's Tzabar Battalion walked out of Sde Teiman base in the Negev without authorization after a dispute with their battalion commander. The trigger was the commander's order to remove and destroy longstanding unit symbols. Soldiers were filmed leaving with their bags while chanting an obscene slogan at their officers. They abandoned their weapons and equipment before heading home. IDF says the conduct is "inconsistent with IDF values" and is investigating.