It was more or less jokes meant to uplift the people affected by the tragedy, rather than going "nothing is sacred" and making fun of them for being bombed.
That is why Colbert is a successful comedian, and others are not.
And that's why Stephen Colbert would never survive /b/, you guys...
Yeah, he's just one of those hypocritical manginas who can't stand any real criticism!
*Eva washes her brain with bleach*