I think The Usos should have been fired and belong in prison for attempted murder, but that's a whole other debate.
Of course WWE is going to be hypocritical and turn a blind eye to certain people while bringing down the guillotine on others like Swann. That's unfortunately the way the world at large works. To be fair though, WWE supposedly does have a zero tolerance policy now when it comes to domestic disputes. Even when Kevin Nash had a domestic incident (with his son, I believe), he was immediately suspended pending an investigation - and that's Triple H's boy we're talking about.
As for Swann, I am not really sure what happened there. Keep in mind that there was apparently some incident with Drew and his wife years back, and no one is quick to label him. By all means we should take domestic incidents seriously - I would never want to excuse anything like that away - but I don't know enough about the Swann and Drew situations to offer an informed opinion, so all I can say is I hope the women involved are okay and not stuck in an abusive relationship (whatever happened with Drew and his girlfriend/wife, they're no longer together at least).