This is really sad and disgraceful.
It's not the first time that such an incident has occured.
Same thing happened in 2007,2012 and then 2014 in the same state with the same ethnicity.
This is a very alarming trend even though the culprits were caught each time.
In every famous tourist destination in India useless louts can be found ,trying to fleece foreigners.This creates an environment conducive to the growth of such hooligans.
Just TV campaigns of "Athithi devo bhava " are not enough.This is a systematic problem and needs to focused upon with the involvement of state gov. apparatus.