Monotheism is misunderstood. We cry to God not because we think no other deities exist. We know there are many who do exist and indeed many have been creators involved in creating from the beginning, even creating life. We cry chiefly to God because God more than anyone should be our God of choice, having sent Lord Jesus to be our Anointed One and die for our sins and having lovingly raised this Lord Jesus from the dead. We cry to God because He is king above all gods. We cry to God because He alone is father over all, under whose authority all things are made to be. We cry to God because no other god can save like our God saves, because He is more mighty than they and none of them can undo what our God does or prevent it succeeding. God has first place and the right to be our God more than other gods. We look to the Lord Jesus for salvation, not because we think no other lords, no other masters, no other saviours exist. We know others do exist. We look to Jesus Christ because He is lord above all lords and because Jesus is alive forever from the dead and has the keys of death and Hell and because He is the one for whose sake His Father has authored the creation of all things. The love extended by God towards us in sending Jesus Christ to give all of us the teachings and truth and provision of sacrifice on the cross for our sins, this love is our reason to make God our god more than any other god when we believe this message and believe in Him and in Jesus His only-begotten Son.
