Hindutavs cant digest the truth - IVC was the ancient Pandian Tamil civilisation, hence the need to deny and mock research works thats contradicts their hidden agenda - foreign origin.
No need to waste time on analysing a dead horse, i.e Vedic Sanskrit - an Indo European language, a language introduced and adopted in India. Vedic Sanskrit shares common features with Persian Avestan and the Baltic , Salvic languages . This linguistic link support the hypothesis that Aryans arrived from the North west in the early second millennium BC
Vedic Sanskrit had no script as it orally transmitted until it was written in Devanagari form , the first Sanskrit religious text were written in Tamil brahmi. As such any attempt to manipulate the IVC script as vedic Sanskrit is a futile endeavour, however with Hindutva propaganda mechanism all is possible
Mahadevan is not alone in his findings on IVC Script to be Tamil,
Parpola
Asko Parpola flags Tamil's links with Indus Valley script - The Hindu