Νot surprised about the Albanian background, remember what happened to Fort Dix in 2007 with the Duka brothers and others.
What i remember was that the US media establishment did not report the origin of the attackers, just reporting that they were from ex Yugoslavia. Finally a woman who was a neighbor of the Duka brothers did a blog post that they were Albanians from Fyrom.
en.wikipedia.org
There is a strong radicalized element of Albanians who have an affiliation to Isis like the late Lavdrim Muhaxheri who beheaded Syrian soldiers in 2013-14 and said this punishment is Quran aprroved and this is what the UCK did to Serbs in Kosovo 1999.
Notably this character was Nato related:
en.wikipedia.org