On the subject of what is/is not controversial:
I suspect part of the problem lies in the geographic hand waving in using the terms 'eastern', 'western', or 'Indian' Himalayas. I would say that it is not controversial that eastern Himalayan glaciers are retreating, nor is it controversial that western Himalayan glaciers are advancing. Yet here we have V.K. Raina’s report which after a quick scan proposes to report on 'Indian' glaciers , which I expect from glancing at the map includes some of both.