I dont know why u r so confused. You judge leaders by their actions not what they say.
You will be distorting history and facts, if you say nehru did not carry out linguistic vivisection.
You may be glad linguistic reorg happened. Let us look at its effects.
In madurai, property of kannada actors are targetted, in bangalore tamil movies get stopped from getting screened, there is violence - destruction of public property on a massive scale, vituperative politicans like raj thakeray (with the silent acquisence of congress) are questioning the rights of hindi speakers to live in mumbai and u say "it was good".
Before state reorg, did tamils and kanndigas ever face off on language issue, or did kannadigas and marathis fight in belgaum?
Brits past masters in divide and rule did not go to the extent of leveraging language divisiveness.