Ill give you an example: Pakistan will avoid attacking a country like Nepal, not because Pakistan is "impotant, weak or powerless" as you put it, but because it isn't wise to attack a small country. So I just leave it at that.
But yes, when Nepal attacks Pakistan (hypothetically speaking), then Pakistan will make sure that Nepal is disintegrated. Just Like India had done to Pakistan in the past.
Does that make sense ?
My post that you quoted was a reply to someone who had mentioned nuclear war. I was merely pointing out that such guys have no confidence in Pak Army, that's why they mention nuclear bombs every now and then because nuclear war is their only hope in case there is a war with India. These guys are convinced that there is no way Pak Army can defeat India in a conventional war.
Hope that helps.