Musk is bringing up demographics, which almost certainly triggers the shit out of Jews(unless we're talking about Jewish demographics in Israel). Not sure if he's intentionally trolling them, but even broaching the subject puts him on their radar, but because it's Asians instead of whites theres not much they can say.

Now if Musk also said Japan needs to accept "immigrants" to replace their losses(of course some Jews have responded to his tweet by saying exactly that), then id say he needs to shut the fuck up, but he never said that, so I suspect he might be doing some trolling and maybe even normalizing the subject in order to support European nationalists.

I do agree with you though that demographic losses are not that big a deal and can be corrected, but demographic replacement is HUGE, and if Jews have their way, permanent.