So she has zero fucks to give when it comes to supporting you and taking a few minutes to read a story that's important to you, but when it's time to fight she's actively pursuing it? That's some messed up priorities.

Removing yourself from an argument and letting the dust settle is perfectly valid. Despite the desire of some to settle things here and there, all it usually accomplishes is both parties saying things they'll regret. Witness your girlfriend's behavior.