These people do not need a direct connection with Isis or any group. They are able to work independently.
Sort of like Christians all over the world working independently who all start missions groups.
No one needs to tell them or finance them, they do it because it is part of their woof and warp.
Don’t look for the connections, don’t look for the why, look at the behavior and the results.
The behavior and words of someone who calls out “Allahu Akbar” while shooting children speaks loudly enough.... except for those politically correct bozos who refuse to hear.
Outcome based jihadism.
“..These people do not need a direct connection with Isis or any group. They are able to work independently..”
Isn’t it true that although these wannabe jihadists are not official members of a terrorist group, the terrorist groups have reached out to them, enlisting them in jihad??
Your #9 is perfect.