Even their cope about "hum aage thay unse, SUPARCO pehle bani" is hugely misconstrued. ISRO was indeed created 8 years after SUPARCO, but ISRO is a successor organization or even can be said as a rebranding of an earlier organisation called INCOSPAR which was set up in 1962 (a year behind SUPARCO 1961) which is in itself a successor to a space research department with in the Department of Atomic Agency (dating to mid to late 1950s). We had research institutions and labs dating to 1947 that started work on astronomy and space studies (radiation etc) started by Sarabhai himself (in his own residence before moving to bigger facilities). The only area they claim "first" is launching a sounding rockets earlier than us but even that was a derivative of the amreeki Nike series of sounding rockets (dont know how much was built in porkiland - but from what I gathered it was either completely assembled in pakiland, or some bits were manufactured and most of it was imported before assebly). I don't know how much of India's first sounding rocket (launched a year after pakis "own sounding rocket") was our own design/manufactured and how much was imported.
All their cope of "hum aage thay, hum first thay" is built on the usual lies and half truths their awam is fed.