It was a silly comment, for that I apologize.
As for the hate:
I don't think anyone denies his accolades in business. This is about him personally intervening in an active war - sabotaging a countries ability to defend its civilian population. And then lying about it.
If you think unrelated success in business ventures absolves an individual of any responsibility, even when we are talking about war crimes, then that is the aspect about Elon where you and everyone else disagree on. Not about whether flying cars or landing rockets are cool. We all think those are cool.