You are correct on all accounts, I was just reading more of Naharnet;
There should be adequate response against those who funded, assuming they exist.
OTOH; a fair number of Lebanese officials are sympathetic to the Hezbollah side, so that needs to be considered too.
That horrific war has raged since 2011; so that brings one to ask, was this previously looked into? Why now?
Naharnet for a long time has been a useful source and their commenters offer up interesting musings.
Suicide bombing at Tikrit; https://english.alarabiya.net/en/News/middle-east/2017/03/09/Twin-suicide-bombing-kills-20-at-a-wedding-north-Baghdad.html 20 killed, this stuff will go on for some time. It’s best for Americans not to be at risk.