You seem to be confusing morality with spirituality.
I am not a Jew - but I follow the Ten Commandments - have them posted above my computer.
Actually, I don't confuse morality with "spirituality" (whatever that is)--but worship of God is essential to morality--according to Christ.
Jesus' 2 Commands (which He said ALL of God's laws "hung on"), above even the 10 Commandments, are, as I stated earlier in this post, love of God, and love of neighbor.
Am I saying Christ indicated that if a person loves his fellow man without loving or worshiping God he is immoral? Correct. And I would add it is impossible to thoroughly love others if you don't love God. There are a lot of nice decent atheists...who treat others well, however, their love of others is incomplete.
Does that make those who claim to love God without loving their fellow man moral? Of course not, one does not exist without the other--but love of God must come first (while still being inseparable from love of man). Love of God, love of man, that is ethics--and also the essential message of the 10 Commandments.
As a Christian, I would also add, that without the grace of God giving a man a new heart, love of God and love of man is as impossible as is perfectly following all the 10 Commandments all the time. That grace is offered through Jesus Christ.