In the original Hebrew, "God" is used in teh plural form 'Elohim'. It is not until Moses introduces 'YHWH' that it becomes singular. YHWH is probably based on Moses' wife's Midian religion's name for "God".<quoted text>
God is for all those who may choose him. His plan was to use Israel as the conduit.
God did not recognize the reality of other gods as sentient entities He simply stated that we were not to have any other "god" before him. This was in reference to idolatry. It's all in the interpretation.