

I didn’t downvote you, for the record lol.
The tl;dr is that India and Pakistan used to be a dozen different countries until foreigners showed up with guns and decided to redraw the map. All those international tensions didn’t evaporate, and it’s more or less the equivalent of trying to put angry cats together in the same bag. The British didn’t cause the tensions, but their fuckery absolutely made it worse.
The article also doesn’t cover the Sikh separatists, but they’ve also been around since the East India Trading Co merged their empire with India, and the current Indian government has been assassinating supporters.
Oh, lame, it asks which one I want to use on my phone. Their app is okay, but there’s some rough spots still. It also doesn’t help that you have to read multiple articles in order to get a full picture, since they split off the history of the British Raj from the overview.
The Treaty of Versailles shook it up a bit and there were various revolutions that softened British rule, but the Brits were there until the 40s and formed Pakistan on their way out.