It's triggerwords like "trillionaire" that really set them off. Their outrage feels similar to how people color train reptiles, by holding yellow circles up against their glass cages to let them know whether or not it's feeding time (yes, this is a real thing they do)...
They're in their glass cages, built by their masters, waiting for someone to say the magic word "trillionaire" to ignite a feeding response driven by hatred and envy for "trillionaire" - when having $999,999,999,999 seems to be just fine in their empty minds, because nobody showed up to their cage to share the magical word with them, just yet....
I'm really happy for Elon.