No good deed goes unpunished.

Elon Musk is a US interest. The US is a bunch of business interests in a trench coat, and they don't always agree on everything. Some want to do business with China, some want the Chinese competition destroyed, and some want to create tension so they can sell more weapons.

The idea that Musk is "counter" to US interests is wrong, he just represents a faction of the ruling class that's not on board with the (trade) war on China. Since it's not in the interest of the working class to have a US-China (trade) war, neither in the US nor anywhere really, he is inadvertently aligned with the interests of the majority of humanity on this one.

You're mad at Musk for this???

Musk has done so many terrible things. Treats his workers like shit, destroys the environment, platforms racists (he's a racist pos himself), false advertising, siphons government subsidies, scams investors (including pension funds, I don't particularly care about scamming venture capitalist and the like), lobbies against public transport and god knows what I forgot right now.

But oh no! He only supports the war effort up to a point, and he doesn't want to have a cold war with China. For once he's kinda reasonable, and for that the libs are calling him a traitor.