Sadly these kind of incidence has happened in past, it is fact that there are some communally biased people in our society and they are part of the system as well.
We just blame police at time but forget police is made up of common man.When we have common people hating each other in name of religion then these events are unavoidable, people will not change by joining police.
We are making efforts that such event does not occur in future, the GOI has passing a bill to allow center to interfere in events like Gujarat.
I sincerely hope that educated people should know the limits of religion, otherwise religion will have negative impact on society.
While we go to temple we pray for god and say we are religious but at the same time follow devil in real life.
If we cannot understand religion well, then better there should have be no religion.