I've been thinking about this, and the over-the-top contortions the media is doing to deny Trump credit or praise is laughably predictable and petty. If they want to ask questions about what's next with ISIS and the terror threat, that's fine. Those are fair questions. However, if you're going to let Obama do the victory lap, then you look partisan trying to deny the same lap to Trump. And the rewriting of history to make Obama look measured is absurd. He talked about his part of the process quite a bit, and of course, "Osama bin Laden is dead, and GM is alive" became a major campaign slogan. Republicans were pressured to give Obama credit. I doubt that Democrats will be similarly pressured. The Adminstration was so committed to the "we won, and I'm great" narrative that its State Department was willing to lie about a subsequent terror attack to keep the narrative alive.
Nevertheless, I do wonder when it became acceptable for Presidents to overtly try to claim credit for a military victory. I listened to Truman's VE-Day speech and FDR's D-Day speech. There was virtually nothing self-centered or self-congratulatory at all in those speeches, and I think people would have viewed it as tacky if there had been. Hell, FDR led the nation in a prayer that would cause the modern Democratic Party to set itself on fire.
The bottom line is that I'm not a fan of the politicization of military victories. But I'm even less of fan of double standards.