The line is fine, and the thing to remember is that you don't get to control who steps over it. The real issue about politics is not that what you say is necessarily offensive, but that people feel so strongly about it that they tend to start arguments.
In analysis, people will invariably make analogies to more familiar examples - if you bring up Ghandi, the analogy to Martin Luther King is inevitable. And that takes us down the road of race relations in the US - definitely political.
Also, while you can start with a clear statement of what happened, your game is probably also gong to want to get into the whys, the influences, and the cause and effect relationships - which are all fairly open to interpretation and political as well.
If it is to be done here, it would have to be done very carefully. Surely, you can say, "Go read up on Gandhi," but going into a deep analysis of the politics in Gandhi's day would likely become problematic.