We should have empathy with bullying billionaires, not because of anything they may or may not deserve, but because empathy is a tool for understanding humans. Empathy is a superpower.
If we fall to empathize with Musk, we can convince ourselves the problem is simply that the wrong billionaire has all that money. That's a fatal miscalculation. It is vital to understand that this power will corrupt anyone.
This is completely separate to the question of whether Musk is a good person or whether he is legally or morally responsible for his actions & the fallout from them. This is about doing right by ourselves by obtaining an accurate understanding of the world, and using that information to make good decisions about your our society should function.