Are churches and so-called Christians who stand with secular nation of Israel standing against the God of the Holy Bible?

Yes, churches and so-called Christians who stand with the secular nation of Israel are standing against the God of the Holy Bible, because the New Testament is clear in its condemnation of Israel for rejecting Jesus Christ as Savior and for killing Jesus Christ.

Churches who refuse to oppose Israel are refusing to submit to the kingship and LORDship of Jesus Christ Himself, who was killed by the Jewish nation of Israel, accorsing to the Gospels.  Of course, Jesus Christ rose from the dead and took revenge on the Jews and the Jewish nation by having it destroyed in 70 AD by using Romans (poetic justice).

It is necessary for Christians to prove heir loyalty to Jesus Christ the King, and the proof of loyalty to Jesus Christ is to stand against the secular nation of Israel, which is the direct descendant of the nation that killed Jesus Christ, according to the Gospels.