A foreign minister is a country' number one diplomat. It is a Foreign Minister's job to speak calmly and politely, to smooth things and calm down tensions, to try as much as possible to present a sane and moderate image even when the minister's country's is not truly such.
A Foreign Minister is certainly not supposed to be the most aggressive of provocateurs, to rattle swords and make bald threats of war. But then, nobody ever had any illusion that Avigdor Lieberman is qualified to be a Foreign Minister.
A person who enjoys playing with fire and who every day sets alight a match or two in a sensitive spot is bound to eventually start a great conflagration.
And he who appoints a pyromaniac to command the fire brigade ... the words fail me.