I have always strived for monotheism even though I admit that I miss the mark by a wide margin.

See Deuteronomy 13 and the general chapters in that area. There is a lot of emphasis on not serving any other gods besides God the one First Cause with no form nor substance and is not a composite. Just to give you a few examples--Anyone you see that has served other gods, you should stone to death. A city that idolatry is wide spread,... you should burn to the ground and kill all its inhabitants. Any prophet that even gives true of his prophecy and works miracles you should kill. [not by stoning.]  

So once the Gra made it clear with his signature on the letter of excommunication what is included in the prohibition of idolatry, it should be clear. that signature is sadly ignored by all, but I still feel that at least I ought to pay attention to it. 

But why is the Gra ignored-because of the mixture of Torah with money. People make their livings off of Torah and so can not see straight.