They're not oblivious, they just don't care because they know there won't be any consequences. And those few who dare to say anything are "antisemite" for not supporting genocide.
They’re the narcissist grandma of international politics: hiding in plain sight, they can get away with anything and everyone else will make excuses for their bad behavior
Realistically, who is going to interfere? US and Russia are tied up in Ukraine, China and EU want to stay out, Modi's India supports Israel. World opinion could get much worse and nothing would happen, Yemen being the only exception so far.
The US isn't tied up, they actively support Israel with money and weapons. They have a aircraft carrier group parked just outside Israel to send a clear message that no other country can intervene or the US will protect israel. Biden even calls himself a Zionist.
They(the ones who liked crusades and auch) probably want Bethlehem taken back from the "heathens" and returned properly to "gods chosen people" or something.