The Sepoy rebellion was initially Muzzis going Jihad. There was some spread to the Hindoo, but it was largely a Muzzi operation.
You’re right. The “rebellion” was started by a few would-be terrorists whon spread the rumor that the soldiers’ cartridges - which the had to bite before loading - were smeared in pig fat. False, of course, but moslems have a shorter fuse than cannon.