“I will make you into a great nation and I will bless you; I will make your name great, and you will be a blessing. I will bless those who bless you, and whoever curses you I will curse; and all peoples on earth will be blessed through you.” (Genesis 12:2-3)
You cannot take that verse to mean we must support Israel no matter what. Israel can, and will, screw up. The entire Old Testament is testament to that.
In fact, Israel is in spiritual rebellion today. They do not recognize Jesus as the Christ. The are still waiting for the Messiah to come. And, according to scriptures, many Jews will be deceived by the AntiChrist into believe he is the messiah. And when Israel throws in with the anti-christ messiah during the first 3.5 years of the Great Tribulation, I’m sure you’ll agree with me that God does not intend for you to support Israel in that decision.