My sympathies to the families and friends of those effected by this tragedy. It is a very, very, sad thing no matter which way you lean politically.
I do think this further highlights the need to not use over-the-top language when it comes to our political debates. Its okay to disagree, but when you paint the other guy as an enemy of the US because they disagree with your view it can lead to bad things. There are crazy people out there who can't tell when a person is exagerating for effect. Words have a lot of power and we need to keep that in mind in our political discourse.