Sikhs can't be defined similar to Hindus as its written in the Indian constitution.

Sikhs are very different from the Hindus. They have very different perspectives of interpretation of religious believes and ideas. Sikh can never be similar to Hindus. Sikhism is an only religions that has always promoted awareness about social welfare and has always fought for human rights and liberty bringing all the humanity together. They have always fought against cruel kings to help poor people belonging to different castes and religion.