I don't see any evidence of that. Yes he was pro hindus and not as much pro muslim. There was reasons for that, 99% of sikhs converts were hindus and not muslims before converting. But apart from that sikh empire didn't displace any muslim from their lands, proof? All these muslim tribes which have origin in west punjab still were landowners when British came. Some of them fought sikhs on local level and lost, others made alliance with them. But sikhs didn't displace them, it just means now they had to pay tax to Lahore and not Delhi. If anything it was British that settled sikhs and punjabi muslim arains from east punjab in west punjab canal colonies in large numbers.
All this talk about genocide is all hogwash to say the least. Many of muslims were not happy with sikh rule and hence supported British against them. Reason could be ban on cow slaughter. As I said sikh empire was pro hinduism by default.