President Obama: Boston and guns anger management!

President Obama, passively upset responding to the explosions at the Boston Marathon, says the United States does not know "who did this or why" but vowed that whoever is responsible "will feel the full weight of justice." (April 15)

President Obama visibly angry addressed a crowd after a gun bill did not pass in the Senate requiring universal background checks. He said this is only round one and that real change is inevitable. (April 19)

Question: Why does his gun bill passage failure receive a more passionate, emotive response than the recent terrorist attack at the Boston Marathon?