You are changing the subject.
You took issue with my contention.
I then responded with a specific fact - namely that America has done more good in the world than any other country that has ever existed. I believe my contention is directly on point in that you were taking issue with the relative merits of America. If you are going to do that, it is incumbent upon you either to acknowledge the great good that America has done as a nation or to point out some other country that has done greater good.
On the other hand, if all you are saying is that America is not perfect - well then that's not not much different than the teenager who gets resentful when he finds out that his parents are not perfect.