“I guess it’s easier to blame guns then his failed role as a father.”
His son was a grown man to make his own decisions and he decided to kill himself. It is not the fault of the father.
If you decide to kill yourself, it is not your father’s fault.
And it's not the fault of some poor shlub who sold a freaking shotgun over the internet. But it was nice of Rick Warren to "forgive" him.