When Federal Agents went to question him, he took a hostage and held police and agents at bay for 8 hours. He wanted to start a religious war and apparently hated Muslims and the President.
TPM has an excellent breakdown of events.
This doesn't surprise me. I am only surprised that it doesn't happen more often, especially here in St. Louis. As if Glenn Beck, Ann Coulter, and Rush Limbaugh aren't enough to inspire these nuts, there is the St. Louis Tea Party. The St. Louis Tea Party chapter is one of the most virulent out of all of the Tea Party groups around the Country.