The word Wahe-Guru is still the main term for God in Sikhi.
The word Ram is indeed used in the Granth many times but not in the same sense as in Hinduism.
The Hindu Pantheon of gods has no value in Sikhi.
Like us Muslims the Sikhs believe in Ik-Onkar (Al-Ahad), not Om (3 gods broken down into a million more).
Extremist Hindus try and destroy the Sikh religion and identity by assimilating it into Hinduism but Sikhism is a seperate religion from Hinduism.
Sikhism rejects many Hindu concepts like idol-worship, caste system etc.
Hindus are trying to introduce Hindu concepts into Sikhism such as vegetarianism, idol worship, caste-system etc. and to some extent they have become succesful (worship of Guru Nanak as a deity in some Hindu temples) but most devout Sikhs oppose this.
Many Sikh leaders have even considered serving beef as karra-parsad because of Hindus trying to make their religion out as a sect of Hinduism.
Your post reminded me of this.