Partially, want to abstain. Grievous practically is a leader of Kalee, and his word, no matter the place has weight... but his hate dislike of Jedi is well known, as well as affiliation with philanthropist Ciaran, who while critical of Jedi is also (to extend) supporting them.
but the crux of Grievous' argument stands: Jedi fault is not the warrior aspect, but their convictions that they are infallible.
Sure, he could say it from Kalee, but in order to catch as much attention it needs to be not only public, but also encompassing (aka presented both on news, AND on screens, billboards, and in such way that people hear the meaning, not what they want.)
"...Jedi are fallible. Huk-Kaleesh War exemplified it. They are good warriors, but most blind themselves in their convictions, believing in that they are right without considering the whole situation..."
Ohhhhh, we NEED to leverage this, but it' be better for Grievous to NOT be on Courascant (place where his statement would have the most impact). Hate this dilemma.
[X] Have Grievous publicly denounce the bombing.
-[X] Through a holonet broadcast from Kalee.