There’s no big authority on how you’re supposed to feel, especially on Lemmy. But there ARE usually rules on what kind of comments you can make, regardless of which “side” of a conflict you’re speaking about.
As for public sentiment, it really comes down to if you’re speaking in good faith or not. These are complex issues with many aspects to talk about, and discussion can be very productive, if you’re speaking in good faith.
As for my personal opinion: You don’t need to pick a side. It’s possible to have a pragmatic view of the issue rather than picking one side or the other.
Edit:
On the last point, I’m seeing a lot of comments (especially on other platforms) along the lines of “I supported X until today, but the actions today make me support Y”. It’s weird that I’m seeing it so often, but it’s a weird statement to begin with.