Hindus believe in many gods. These gods are described as having human form. Often they are couples, a male god and his female consort. Hindus make visual representations, images, and idols of these gods and worship before these. When you understand this you immediately realise that no Hindu should raise objections to Islam. If they feel that one of the minor items of Islam is wrong you should concentrate on showing them that at the fundamental level Hinduism is wrong.