Lak, the London riots started precisely because the police shot and killed a suspect they were attempting to apprehend. One suspect, originally claimed to be armed but subsequently believed not to be. The suspect’s friends held a small demonstration the next day to demand answers (note that this was before the story got changed – shooting a suspect in Britain is that controversial). Some of their friends mistook this as an invitation to violence (that wasn’t the intention of the people organising the demonstration) and they attacked the police. These people had friends across London who then started attacking property in their own mirror protests. These were hijacked by random troublemakers, leading to the protests eventually seen worldwide. Most of the 3000+ arrested didn’t even remember what started the whole thing, but that doesn’t mean that one isolated incident didn’t incapacitate a large city’s nocturnal trade functioning for the best part of a week (as well as impair several other cities’ trade for some time).
There was meant to be an inquest but evidence was lost and as a result the inquest may never happen. This is extremely controversial. The police are only meant to use tear gas and water cannon (a less dangerous alternative that might not be practical in sandy Bahrain) in certain specified circumstances, and live ammunition not only requires specialist training but can only be used in extreme situations, generally involving criminals likewise armed with guns, or mobs outnumbering the police by dozens-to-one. The police are trained in a large array of techniques that are designed to de-escalate situations without recourse to violence. (Kettling, a technique which I’ve read the Bahrain police use in these village attacks, is restricted in use in Britain due to its tendencies to aggravate those “kettled”). Police on horses and dogs, lightly-armoured vans (used as fast yet protected minibuses full of police) and foot patrols with shields, are common. Tasers (electrical stunning devices) are somewhat controversial because they can kill if badly used or if the target has certain medical predispositions, but they are nonetheless quite frequently used against violent criminals where other methods aren’t viable.
The other key thing is respect. If people can’t respect their leaders, they won’t see any point in keeping to the laws. If they can’t respect the people who enforce the laws, they might follow the laws to a point but they’ll see no reason to take responsibility for their actions if and when they feel the line is crossed. Even if they can’t remember or can’t articulate why they felt the line was crossed in the first place. If someone in the F1 community gets hit by a Molotov cocktail from a protestor or tear gas from the government forces, it won’t matter if either side can understand the other or not. It’ll be just as injurious – and it’ll have just as powerful a negative effect upon Bahrain’s prospects of ever getting another F1 race (or any other FIA event; there’s a WEC race due to happen in Bahrain in October, lest we forget…)