Why not? If Indian security forces deliberately kill, torture and rape civilians, then they are committing acts of terrorism and are terrorists. I fail to see how wearing a uniform changes the nature of the act - it is still the murder of an innocent, the rape of an innocent, the torture of an innocent, ostensibly in pursuit of a political objective of perpetuating Indian occupation of J&K.
Let me explain what is the difference between uniformed men and your terrorists whom you prefer to call as freedom fighters.
And one more thing is that I will not go into proofs like Kashmir insurgents do attrocities etc, as that will take the debate in other course...
Hitler's Nazi terrorists were at one point 'elected' as well. Just because a government is 'elected' does not mean its policies, or the actions of those charged with implementing those policies, are automatically correct and legitimate. The tens of thousands of murders, rapes and torture of innocent Kashmiris by Indian SF's obviously indicates that not to be the case.
So what if they are 'disowned'? That is our problem. The issue here remains the acts themselves, not what the people committing them are called and whether they wear a uniform or not.
Terrorism is the act of deliberately committing violence against civilians (you may insert 'in pursuit of a political objective' here if you wish). I fail to see how a uniform changes the nature of the act.