Wiktionary
jihobbyist
n. One who supports jihad and radical Islam despite not being a member of any violent jihadist organization.
Wikipedia
Jihobbyist
A “jihobbyist” is a term coined by Jarret Brachman to characterise a person who is not an active member of a violent jihadist organization such as Al-Qaeda or the Somali Al Shabaab, but who has a fascination with and enthusiasm for jihad and radical Islam.