As someone else pointed out, it's not just the comment. There's context you're either ignoring because it's inconvenient for you, or you don't know because you couldn't be bothered to learn more about it.

The video is harassment content, plain and simple. It's filled with disinformation and he lied about not using GrapheneOS moving forward. The developer was swatted multiple times, then when upset with Rossmann he tried to talk to him about his support for harassment content (the swatter was a fan), and instead of being a decent human being, Rossmann made a video of it while it was happening.