Love begin from love my brother

Isaiah 17:1-14
See, Damascus will no longer be a city but will become a heap of ruins.
In that day people will look to their Maker and turn their eyes to the Holy One of Israel. They will not look to the altars, the work of their hands, and they will have no regard for the Asherah poles and the incense altars their fingers have made.
You have forgotten God your Savior; you have not remembered the Rock, your fortress. Therefore, though you set out the finest plants and plant imported vines, though on the day you set them out, you make them grow, and on the morning when you plant them, you bring them to bud, yet the harvest will be as nothing in the day of disease and incurable pain.
Why?
The prophecy also attacks Israel for siding with Syria against their kin - nation of Judah.
Ally with others to against our own brother is not acceptable before the Lord.
How?
Actions of love is love our brother first.