He is completely out of government and he is not running for anything. His own record is clear and he is not a war monger. In fact, other than Carter, no one is less so in reality.
No matter what the American media says, he knows he was a key player in getting 1300 tons (per politico - long ago JK statements said 600 tons) of chemical weapons out of that unstable country.
That happened ONLY because of the threat of force. If JK had pushed Obama in the direction DU wanted, which was essentially to not respond, it never would have happened.
The only thing I read was a comment at a Peabody event before the strikes and comments in Politico where they quote an anonymous friend of Kerry. In the Politico piece the goal of this tactical strike was good if it is used as a lever to stop chemical weapons being used and move to a ceasefire and diplomatic solution.
Kerry is being consistent and most foreign policy analysts over the last few years argued that the fact that the Obama administrations had ruled out a military response made the diplomatic effort much harder.
As it is, last night there were reports that Trump said this was all that will be done. That statement and the lack of a competent negotiator might already have lost any possible benefit.
At to Kerry, the many medals and honors he received internationally and the praise and respect he got from people who worked closely with him and those to him are what matters. Probably the only thing that matters more is what he thinks of his accomplishments himself. I saw a tweet I did not understand a few months ago until my daughter Sent an email to listen to a podcast that Heather Higginbottom did. The tweet, was something like - I hope I live a life where someone will speak of me like Heather Higginbottom spoke of Kerry. The next day, my daughter Sent me the link as she follows that series of podcasts.