There will be an event in my town soonish about the background of the Ukraine conflict, and the speaker is a total lib. What questions should I ask, what incontrovertible facts can I use to combat liberalism?
I have Victoria Nuland and John McCain speaking and handing out cookies on the Maidan and talking about their material support for the coup. The revelations were used by western press but they came from Wikileaks and I can totally see that being dismissed out of hand. They'll probably also obfuscate the Nazi elements in a similar manner to the way the western press is doing constantly.
I have the UN/OSCE reports on civilian casualties in Donbas, I have the Congressional arguments about whether or not they want to support the Nazis directly... What else?
You should try to play to the crowd. I'm assuming the audience will be mostly ordinary republicrat liberals with weeks of TV brain poisoning on this issue, but this might depend on the exact venue and demographics of the place. Aim for questions which reveal important historical background. It might be a good idea to ask some questions about how Putin even ended up in power in the first place. This line of questions could be perfectly cloaked as liberal concern while smuggling in enough historical context to make some people think "wait a minute."
No matter what questions you ask, you are not going to convert the audience into principled anti-imperialists. But you could plant some seeds about what was really going on in the early Yeltsin and Putin years of the Russian Federation. The best outcome I'd hope for is convincing a handful of people that this war is blowback.