Yes, Christian leaders who stand with the secular Jewish nation of Israel are betraying Jesus Christ, because the secular Jewish nation of Israel is the direct descndant of the nation of Israel which ruled for execution of Jesus Christ (Jewish Supreme Court of The Sanhedrin in the Jerusalem Temple in Israel).
It is absolutely necessary for all Christian leaders to stand against the secular Jewish nation of Israel, because Jesus Christ in the Gospels in the New Testament stood against the Nation of Israel. What Would Jesus Do?
Christian leaders who stand with the secular nation of Israel which does not respect the Divinity of Jesus Christ or recognize Jesus Christ as the Savior King are standing against the Gospel.
It is important for these so-called Christian leaders to repent and align themselves with the Gospel of Jesus Christ and oppose the secular nation of Israel.