The photograph of Eric Holder placed next to James Foley's execution. Also the inference about treating terrorism "only" as a crime.
Also: Fox News is still linking a story* that warrants a lot of skepticism. Meagan Kelly and Sean Hannity reported on their programs last night that officer Darren Wilson suffered an “orbital blowout fracture to the eye socket” in a struggle with unarmed teenager Michael Brown." Implying Officer Wilson was defending himself, and the use of force was justifiable.
--- * This story is getting a lot of play on right wing websites (e.g. Drudge Report), and is also starting to get picked up by more mainstream news outlets on the Internet, lending it some "credibility."