Israel should be treated like any other friendly albeit secular nation. The Israel today is comprised of those physical Jews and Gentiles who have come to know and trust the Lord Jesus Christ as the only way back to God. So the Israel of God is comprised of the spiritual children of God and no other. Anybody who preaches or teaches otherwise is an enemy of Christ, no more less than the Jews of His day who died in unbelief or faith in their own works and not the finished work of Christ.