You don't need to take it at face value.

Martin's girlfriend testified that Martin left the house to go hunt Zimmerman down.

Shortly thereafter, the neighbors recorded Zimmerman screaming for help, followed by a gunshot.

Shortly thereafter that, the police find Zimmerman with a busted scalp and grass smeared all down his back.

You're not refusing to take Zimmerman at fave value, you're just refusing to accept the evidence because it tells a different story than the one you became emotionally invested in.

You read the initial articles about a guy who stalked and murdered an innocent black teenager, and you're never going to let facts and evidence change that story.