I think the "stories" of riots and violence due to India-Pak matches are totally exaggerated and in some cases outright false. I have never witnessed any such "riots" ever since I started following cricket. The celebrations are louder when we win against India - fireworks etc. - but when we lose the backlash is maybe a bit harsher, but in no way more violent. The most violence I have seen is when the match was disrupted in 1996 world cup against SRL or when stones were pelted during the 2003 world cup when we lost to Aus in the group match. Neither incident related to Pak in any way.
Edit: And I am not saying the rivalry isn't fierce. It is mainly because of the wars we have fought and the deep rooted political issues between the two countries in general. But just that these tales of violence and riots are hardly ever true (Atleast on the Indian side. I cannot comment on how fans/public reacts in Pakistan)
Have u forgotten, V Prasad vs A Sohail ! Or Eden Garden having to be emptied during the now defunct Asian Test Championship after the SRT run out, after he was blocked from finishing a run by Wasim (probably). Not to mention tonnes of these type in incidents in Pakistan.
Love Moin Khan saying SRT shouldn't have walked off, only one stone had hit one of his players.