Pakistan's vehemence on India start right in 1947-48 when Raja Hari Singh acceded Kashmir to India. They try to capture Kashmir and more or less unsuccessfull capturing barren lands. In 1965 they started operation gilbitar(?) to liberate kasmir,again they failed. In 60's the pakistan secret agency ISI started a programme to sabotage India and spread havoc and unrest,by infiltrating, foriegn (afghan,arab)militants into India, suporting finantially and morally, the muslim outfits like SIMI and so on, and there by creating terror.Its still continuing. India, obviously will only point at pakistan, due to its past experience.