Sure, some of the people who have been awarded the prize in the past could be questioned. But remember, Al Gore had been promoting environmental causes for 20 something years before he got the award. Jimmy Carter had been in the trenches for decades. Teddy Roosevelt had helped broker peace in the Russo-Japan War. Clinton never got the award, despite his part in bringing Arafat and Rabin together, his attempts at peace in the Balkans and Northern Ireland.
Regarding Kissinger, he wasn't the President. He might have advised Nixon and later Ford, but it was up to the President to make the necessary military decisions. He didn't bomb anyone. President Obama still has troops in Iraq and Afghanistan.It's just too soon for him.