You see, what Tsarnaev did is not just between him and God. He didn’t look at porn or cheat on his wife. He committed a public act of mass murder in the name of a religious ideology. God has final say over the disposition of Tsarnaev’s eternal soul and all that, but Caesar–which is to say, the society against which Tsarnaev committed this crime–has a clear and compelling interest, too.
Oh, and by the way, it’s pretty big of Islamic Funeral Services of Virginia to “strongly disagree” with Tsarnaev’s “violent actions.” I know what you’re thinking: “Strong disagreement” is normally what we have in disputes over, say, immigration policy or a presidential election and ideologically-motivated mass murder probably warrants something a little higher up the condemnation scale.