who did? I've only heard this phrase from this forum and have never seen any proof that this was said by any Indian official. sure, I know nothing about what the consulates do in Afghanistan, they might be funding things with the cooperation of the internationally recognised regime in Afghanistan, but at least I've seen the government openly brag about destabilising other countries.
but even that aside, my point was that Pakistan has did much more to Afghanistan than even India and Pakistan have done to each other. How much damage have Pakistan funded insurgents done in Kashmir or India funded insurgents have done to Waziristan and Balochistan? I can guarantee Pakistan supported entities have done 10× that to Afghanistan.