Ezekiel cuts his hair and does with it symbolically as God will do with Israel, for her sins. Uprooting and destruction are coming.
Ezekiel addressesthe mountains of Israel, where God's people were committing idolatry against Him. Pestilence, famine and sword are coming from God for this.
God has set a day for this, and it is coming, when all the gold and silver they used to make idols will be plunder for others, and replaced with sackcloth, empty stomachs, and lack of wisdom.
God gives Ezekiel a vision of the idolatry going on back in Jerusalem, in the temple itself, by the priest/guardians of its purity.