Dear Sohel NR bhai,
You CANNOT have "God alone" without the Prophet, hence, the testimony of faith- "There is no diety except Allah and Muhammad is the Messenger of Allah". Can one be a Muslim just by testifying the first part of the Shahadah? NO- thats the verdict of scholars of Islam- both Sunni and Shi'ah. There is a Ijma' on this matter.
I can only say you're treading a very slippery slope here and you should stop right there! What you're propagating here is outright dangerous, to say the least. I suggest you consider your stance carefully.