We will have to agree to disagree on this. The genie was long out of the bottle on this issue. Not like it could suddenly have been put back around 1947. Jinnah was not going to be there on the scene forever, nor was Gandhi, Nehru, Maulana Azad & Patel. If there was a civil war that happened after their time, it would have made the partition massacres look like a minor brawl. It was for the best that the British partitioned the country, that was the only way we could have managed. When you realise how quickly after Jinnah that Pakistan lost the plot & eventually half the country, you are being very generous in thinking that those pygmies masquerading as leaders would not have resorted to whipping up religious sentiments to get political traction.
From India's point of view, partition was probably the best thing that happened (except for Indian Muslims, the loss of the middle class was a massive damage from which it is yet to recover). Even as we dismiss the 2NT that caused it, you have to think rationally about partition itself. It allowed Indian leaders to largely set themselves up into a constitutional democracy with liberal underpinnings. That worked because the number of Muslims in India were not seen as a significant threat by the majority. A larger Muslim population would probably have caused the Hindus to coalesce into a more rigid grouping & would have probably been opposed to any reform seeing at as an assault against religion because the chances are that Muslims would not easily vote for reform in their laws. The large scale reforms that were pushed through were only possible because that threat receded.
I believe partition was inevitable, anyone who looked closely at Jinnah's proposal would have realised that it would have come to a boil in about 10 years & without Jinnah around, a violent bloodbath was guaranteed (even more than when he was around). The countries that you cite are not the same in composition as the subcontinent was. This was always a tinderbox & while I regret that we lost the likes of you to partition, I can only say that there are only a few of your type around. I would argue that partition was both inevitable & in India's case (will leave Pakistanis to make their point), was largely beneficial.