It is a very basic assumption made when dealing with insurgency, radicalism and anarchy.
>They are poor
>They don't have opportunities
>They need infra and development
This kind of assertion is very prominent and pushed by western liberal world who live in more or less homogeneous and stable demographics.
Such statements tend to humanized the crowd and relives them of any accountability.
They are also pushed as a countermeasure to the right wing ideologies in case of India its Hindutwa.
Muh poor, muh no opportunity is one of the many factor but not the sole factor. Ignoring a major factor that is inate radicalism towards a section of the society is why people voted BJP in 2014.
"Oh no it's not like they have anything against Pindus, they are just poor that's all".
Kashmir to an extent had better HDI than much poorer counterparts of India but still they chose to revolt and that too revolt in a very bloody manner not seen in any other radical insurgency across India.
Kids in Gov funded Medical schools cheering for terrorists is not due to lack of opportunities, it is something else and I hope people have braincells enough to realize what.
Folks like
@angryIndian have a tendency to put economy, money above everything else. He is not very found of Hindutva and that's okay but he does not recognize the fact that there are people who are not well wishers of Hindu as a collective and there is a certain degree of malign in them.
After everything you will find peope uttering "The Manipur problem is complex" but behind the complexity there is carnal instincts.