Sikhism believes in unity of mankind and does not discriminates on basis of caste color, religion etc. But because OP specifically asked this question hence I would like to point out. There are some elements in Hindu society which are bent upon proving Sikhs to be part of Hinduism with the long term aim of assimilation of Sikhism into Hinduism. RSS is at the forefront in this thinking. Sikhs do not like to be branded as Hindus.
Sikhs are proud Indians but not Hindus. All genuine demands of Punjab state are given a communal color and Sikhs are branded as anti-national Indian/Hindu media portrays Sikhs as dumb wit persons. Which is having far reaching impact and needs to be stopped.
Sikhs do not hate Hindus as whole but Sikhs do hate: Indian Judicial System which failed to provide justice to Sikhs as a community, Indian political parties congress which was responsible for the carnage and BJP for using this issue to get votes but not doing anything to bring justice to victims and not acting rightly during the high tension days before and after 1984 in Punjab.
Even when Sikh History is full of almost continuous armed and unarmed conflict with the rulers of various times, who have had declared themselves as Islamic rulers mostly, nowhere in Sikh History these oppressors are referred by their religion. They are referred as Mughals or Afghans, etc. This shows that as a Sikh, we understand that a belief system with core positive beliefs is not to be blamed.
Similar is the case with Hindus, so many Pahari rajas (Hindus) of the time attacked Guru Sahib even did treacherous acts, but no, that doesnt mean that Sikhs start hating Hindus. Indian society in general, which is 80% Hindus and includes Sikhs as well, is very tolerant and friendly. Our society has been like this.
For working with victims of 1984 genocide and making a movie named AMU on them like most religions Hinduism includes both teachings that condemn violence and war, and teachings that promote it as a moral duty. The teachings that condemn violence are contained in the doctrine of ahimsa, while those that permit it center around the Kshatriyas – the warrior caste.
A key teaching is contained in the story of Arjun. Arjun was about to go into battle when he discovered many of his relatives and friends were on the opposing side. Arjun didn’t want to kill people he loved, but was persuaded to do so by Krishna.
Ahimsa is one of the ideals of Hinduism. It means that one should avoid harming any living thing, and also avoid the desire to harm any living thing. Ahimsa is not just non-violence – it means avoiding any harm, whether physical, mental or emotional. In modern times the strongest proponent of ahimsa was the Indian leader Gandhi, who believed that ahimsa was the highest duty of a human being. Gandhi did not equate ahimsa with non-killing – he accepted that killing because it was a person’s duty, and doing so in a detached way without anger or selfish motives, would be compatible with ahimsa.
Underlying Hindu opposition to killing or violence is the concept of Karma, by which any violence or unkindness a person carries out will return to them at some time in the future by the natural law of the universe. When Hindus are violent, philosophers argue that this is because those who do harm do so because they have yet to evolve to a level where they understand and seek peaceful conduct.