Response to The Avenging Titan
Obi-Wan and Anakin would definitely be upset and would try to stop him. Dooku, Maul, and Sidious might try to manipulate his anger even more. Padme and the Jedi Council would also be pretty upset. I could actually see Padme support Robyn Hill. Grievous...I'm not so sure.
Luke and Leia would definitely try to stop Ironwood. I'm not 100% sure about Han or Chewie, but if Luke and Leia fight him, they would have their backs. The Emperor might tell Vader to probe him further, to which he would agree. Fett would work with the highest payer.
Rey, Finn, and Poe would definitely try to help or do something (like in Episode 8). Rose would join them, and maybe others from the Resistance. As for Kylo and Snoke, they might probe him further.