NDTV is a chronically lying tv channel and a den of charlatans and political pamphleteers, and only fools would trust their word on anything.Recently they lied about authenticity of Kanahiya tape, which have proven to be undoctored by labs.
Journalism is a profession of lairs and charlatans. That being said, it could not be stated with certainty whether "Kairana-exodus" stories are true or not from NEWS reports, as all journalists spins a story based on anecdotal evidence.
Unfortunately, the veracity of this story could only be established in upcoming 2021 census. If it is found that there has been a steep fall in % of Hindus in Kairana between 2011 and 2021, then there was "exodus". Alternatively, a makeshift census in that district could be conducted to ascertain facts on ground. This ideological whøring that goes on in name of NEWS reporting or even administrative reports which are prepared by slavish state officials are not a way to find the truth.