Why only Indians ( especially students) are being targeted in Australia. Can somebody tell me why other Asians are not. What is the reason that led to this?

Mostly because they find Indians some what intimidating, in terms  of culture and the way they go about everything, as most of the Indians are not outgoing as others, and in Australia people are more outgoing and Indians are more successfull in their fields and are more intelligent than their counterparts so to vent their frustration they are targetting Indian students....and which started as just few fights has now gone bad and worse situation where almost each week some or other cases are reported against the Indian students...and this has not stopped, so the Australian Government is not doing enough to protect the interests of foreign students who throng to universities abroad for their higher education.......

i guess dats because they find Indians as their biggest threat for good jobs and good education too cos most of the Indians outperform themselves whether in job or in studies, especially when we are working in some foriegn country,cos most of us tend to shoulders some responsibility back home,so we tend to put our best efforts,which in turn reduces opportunities for the local students,and thats why they are targetting us. 

There might be some fear factor among those australians  attackers that indians are better than them.They will get better opportunities & better placement later on after finishing there studies.Recession is also a crucial factor. In Canada also such kind of incidences have taken place.They are also feeling inferiority complex &  sense of insecurity  while thinking that  these Indian students will seize their job opportunities.