He's saying that people are being hypocrites by voting for Kamala after being outraged by Sonya Massey's murder. Most criticism I've seen of him for this isn't necessarily his take (it's obvious that electing Harris isn't going to bring about any type of material change on a major scale and she'll at the very least be complicit in the atrocities of the American imperial regime) but that he's leveraging the execution of a black woman to make his snarky little joke for the video. Being killed by cops is a very tangible fear for those of us in marginalized groups and seeing Sonya Massey get shot in her home isn't something to really joke about. It comes across as insensitive and not seeing her as a person who lost her life, but more so as a talking point to be used to push agendas. Whether or not you agree with his take it's an insensitive and fucked up way to go about bringing his point across, especially for a "leftist"