Its really confusing for me to answer this question.This question is in 2009 paper and it goes as,

Q 1.Ghaznavi's invasions of India are controversial while some consider him a mujhahid others consider him an aggressor which opinion do you support.support it with strong arguments.

Now what should be the answer i mean as muslims we consider him a hero,have missiles after his name.But when it comes to writting answer in css paper what should be our stance.
Arguments are strong on both sides.As some are pointed out by umarabbas too above.i just want to know what should be our position on this personality.
I need a clear cut and unambiguous answer to this question.