Tom - that wasn't a threat to the President. And, during the Bush years...do you have any proof that someone was threatened or something else...perhaps, detained...simply by disagreeing with Bush? He always supported everyone's rights to free speech. A threat is one thing. Expressing a personal view or opinion is entirely another.
And yes, this is a legit story. Not only did I provide links to various news orgs, but I heard an interview with the victim on the news talk radio on my way to work this morning. So, this is not a "oh, I heard it from this guy, who heard it from this guy, etc." story.