Not jumping on you but sorry you'll get no cooperation from me in regard to not calling this animal abuse or cruelty, which in this case I personally view as being much more than a "little irresponsible" or just a bit of cichlid domination stuff -- one of those fish is going to die if not removed, and I can guess which one. Putting another cichlid (esp. 1 that is already injured) in a tank with a Flowerhorn, which are known to be super territorial and aggressive, and then letting them keep at it until is 'settled' is just screwed up regardless of rhetoric or semantics. Flowerhorns don't seek domination, they seek annihilation.
And the guy is clearly entertained by the whole thing -- hence his using "Lol" in the title. What a great message to send to aspiring young fish keepers...
Btw, comparing pellet training (in order to provide a fish with a more well-rounded diet) to starving children is in itself a false equivalence (or logical fallacy). Most fish can easily go a week or two or more without food, children/human beings, not so. Whether the withholding of food to a fish is arbitrary or natural it doesn't make your initial comparison any more logical.