PRC is not the weaking Qing Dynasty, we have a GDP 4-5 times of India, our manufacturing military base is far stronger, so what if we manage to destroy India? The true winner would be US, that's exactly what they want to see!!!
Our biggest enemy is US, not India. Try to have more long-term strategy, not being short sighted.
no one suggested that China should destroy india, but China would manage India and get her lands back as soon as possible because tomorrow India will become too powerful to be managed. an offensive strategy doesn't mean full fledged war. but the more you delay, the more acute the threat will become. from a professional point of view a threat should be neutralized at the earliest as prevention is better than cure.
no body said US isn't the enemy of China, but China's foreign policy shouldn't be US centric in all aspects. the world is changing and with these changes new threats are coming to the surface while old threats are fading away. I suggest you to read military history of the world.