In re: Dealing with Anti Nationals 

I don't buy the theory that the anti national graffiti at Jamia Millia Islamia was done by pro government people.

The people who did it are anti nationals. Anti national tendencies exist. HOWEVER it's wrong to paint a broad brush.

Identify who did it - expel them from the college - do NOT arrest them - put them under SURVEILLANCE.

Similarly, Sharjeel Imam is an anti national. People who support his views are anti nationals. He too should be released & put under SURVEILLANCE. 

SURVEILLANCE of such people is more useful than keeping them in jail from the point of view of national security.