You seem to be claiming Kerala as the norm rather than an outlier. You're certainly welcome to compare crime rates between the two and/or suggest explanations/compare living conditions, but saying that very low crime rate is the norm is simply false [1]
No - I said Kerala has a high crime rate - but a relatively low homicide rate. Kerala is definitely an outlier in many respects in India. What I am trying to hint is it is not exceptional to have low homicide rates - there are several parts of the world where it is the norm. It may be better to consider high homicide rates in some developed, high HDI regions as an anomaly and analyze the reasons.
1: http://en.wikipedia.org/wiki/Murder_rate