You make a reasonable point, in that if China initiates a war against India and wins a decisive victory, it might drive the 'fence-sitters' to run for cover and seek protection from the 'other party', thus letting China lose out to the propaganda machinery.
On the other hand, there could be just the opposite effect. It might make those 'fence-sitters' and those nations that bear ill-will to China to realise that China is truly a Military power to be respected and that its goodwill and patience are not to be taken for granted. It may bring the 'fence-sitters' into China's orbit and drive the hostile nations to be more cautious.
Regarding the passage you quoted from the book, the author makes a valid point regarding the manner in which China used force in those instances, but I also feel that the author missed to point out that China might have truly felt threatened in those instances, and that the actions of those nations directly trampled on Beijing's interest.
In the 1962 war, China's objective was to deliver a quick decisive blow to India and halt India's expansionist policy at the time, which it succeeded. The Chinese even withdrew after reaching as far as Assam. Assam is the gateway to Northeast India.
What has all the Kind gestures and 'win-win' policy begotten China from those Propaganda spinning nations? What has China even gained by its proclamation of 'peaceful rise' time and time again and again? More scorn, more lies and more sanctions and bans on its companies.
Is it time for China to try a different set of policies for once and see if it works better?
No amount of trying to please the US -led Western order will let them ease the pedal on trying to find every means to halt China's economy, or even destroy China, no matter if Millions die.
China has demonstrated many things in recent decades, it has demonstrated an enormous capability to build, lift hundreds of Millions out of poverty, help Africa and other developing nations to develop their Infrastructure, it has demonstrated tremendous technological prowess and the staggering ability to adapt those technologies for its societal benefits, China is second to none as a space-faring nation, it is the greatest trading nation etc, ( too numerous to write them down.)
One thing that China has not demonstrated, the one thing that will truly protect all its achievements and abilities, and culminate to a point of catapulting it to True 'Superpower' status is Military Power.
Are you saying that USA the real super power gets humiliated by North Korea ? North Korea conducts routine missile test and even nuclear test that break international law. North Korea also developed missile that can hit entire US with China's help. yet US did not go to war with North Korea !!
Now you are saying that China, having grabbed 800 km of land from India with almost no personal losses, should go beat india up like 1962? Even thought India did not attack China yet, only moved a few divisions of cannon folders to the border?
Hahahahahahaha.