Proselytizing is always offensive. Belief or Faith is good. Religion is negligible, usually on the negative side. Atheism is combined with Belief or Faith. Politics is always two sides of the same coin. Yahweh, God and Allah are all the same deity...
You find redheads offensive? Haha.
They are certainly not all the same Deity. There are many Gods spoken of in the Bible.
Ten Commandments: "Thou shalt have no other Gods before me."
Thats not saying 'dont worship idols'; theres another commandment that deals with that.
In Genesis, the creation story is basically told twice, and is broadly misunderstood because we simply use the word 'create'. In the original texts there are two different words used. One means to create from nothing, as the Supreme Architect, or God, did in the beginning. The other word used in the second telling of creation means to create from what already exists...which is what the elohim, or plural gods did.
Suggested reading: Gods in the Garden by Steve Smith, Gods of Eden by William Bramley.