"given that kernels are your research project, i expected that you'd already tested whatever you're talking about on wayland and contacted its developers about security holes,"

and he replied curtly, i don't think anyone on hacker news would be "calling him out." the idea that her tone is "too aggressive" is highly suspect. it is not unusual to express ideas as if you believe them, nor to conduct yourself as if your blog posts needn't be written in the tone of My-First-Job-Interview or Visiting-My-Conservative-Grandmother-In-The-Hospital.