Back during earlier covid, Musk was complaining loudly about lockdowns in California and how he was going to leave the state because of it. That pissed off the libs quite a bit since they were super pro lockdown, so this dislike of him hasn't been totally out of the blue. HOwever the left are tech lover and they will probably line up for their brain implants even if they hate Musk, it's the moderates and the right that he needs to win over.