It's worth keeping in mind that the profession of a diplomat in large part involves, indeed above all requires, the ability to see the matter from the other fellow's point of view. We've had perennial problems with our own diplomats being so skilled at it that they forget which country commands their allegiance.
Here, Mr. Peck's partial citation is carefully circumscribed in a fashion that seems impossible to read as other than tendentious. The first term set out in 18 USC 2331's definition of the term "international terrorism" [1] is thus:
> As used in this chapter--
> the term “international terrorism” means activities that--
> involve violent acts or acts dangerous to human life that are a violation of the criminal laws of the United States or of any State, or that would be a criminal violation if committed within the jurisdiction of the United States or of any State;
While I'm happy to concede that the US government has taken a somewhat cavalier line with regard to its own policies on the declaration of war, our legal and judicial systems have yet at this time to find that such conduct is unlawful. Until that changes, there seems no clear argument to be made that that conduct qualifies as "international terrorism" under the definition our law provides.
To claim that the problem of suicide among US soldiers and veterans is mere "unsourced myth" is to say the least remarkable. You may care to examine a recent report [2] on the matter, produced by our Department of Veterans' Affairs - an organization whose misfeasance is legendary among veterans themselves and among other Americans knowledgeable on the matter, so if anything, even the vastly disproportionate rates there described are still likely to be low. Or you may not care to examine it, preferring instead to continue in the comfortable fancy that I'm just making this all up to serve my turn. I don't really care either way which you choose, but the facts are here before you, if you have any interest in them.
As for the rest - I do suppose I can understand how it might seem that way, for all that the difference is purely one of perception and analysis. I don't see any compelling reason at this time to privilege your perception and analysis over mine - and it does seem as though yours is somewhat less universally shared than you may imagine; at any rate, some of the world's most effective snipers are countrymen of yours. Perhaps they come from a world less like yours than like mine.
[1] http://codes.findlaw.com/us/title-18-crimes-and-criminal-pro...
[2] https://www.mentalhealth.va.gov/docs/2016suicidedatareport.p...