On the one hand, nothing wrong with this post, and frankly I have no issue with it being stickied.
From a general humanitarian point of view, this is very much laudable.
On the other hand, the post coming from the user in question and choice of posting it here specifically, does not strike me as one whose primary intention is to innocently encourage donations or goodwill.
TBH, I'll point out that both here and in CDF, this is sort of a test to see what kind of response I'd get. I understand that both CDF and SDF are very nationalistic, and I don't actually have a significant expectation that I'd see much donation from either community. On the other hand, it lets me know what people's true colors are and help me understand Chinese nationalist opinion as well.
The situation in India is basically a tiling of Wuhans (i.e, bodies being burnt on the street and so on, overrun hospitals). It's a major humanitarian tragedy in a third-world shithole, the thought that should be going on in your mind is that "it could have been us". In fact, it's precisely what the Americans and so on were hoping would have happened in China, except that it happened to their new Quad ally instead and is probably going to destabilize India.
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As to the attitude of helping your enemy; when you are weak, you do everything possible to sabotage your enemy. When you are at parity, mercy and kindness is at a premium. When you are strong, on the other hand, your enemies look like children, pet animals, or whatever.
That is to say, India, with the COVID-19 disaster, has shown that it's weak and mostly harmless. While the US can potentially build up India, it's not that different from building up the KMT during the Chinese Civil War; India is apparently so corrupt and incompetent that American efforts to support India are effectively money sinks.
And when the other party is weak, it's actually possible to show kindness and toleration. You are actually demonstrating strength because by helping India, what you are also saying is that "India is no threat to us", and that despite the Indian rhetoric, hatred, and racism (I've met Indian ethnic minorities who describe the Hindu majority as defined by hates), you can help them out at no threat to you because they're not a threat to begin with.
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Reading Indian comments on Chinese offers of aid, you see a lot of people complaining because they view being helped by China as a sort of humiliation if they have to accept aid from a stated enemy. But, put it another way, the Indians require 200k oxygen concentrators, or around 60 million in aid, and a capacity that's probably one that the Chinese oxygen concentrator industry can entirely fulfill, so it's basically only the Chinese that can bail them out fully on short time. I'd argue it's a nationalistic act for Chinese to bail out the Indians, especially if China ends up profiting from bailing them out.