These people aren’t to be trusted period.
I wouldn’t believe anything of Muslim origin at face value, as they have a goal that includes subjugation of the populace of the entire World to Islam, or either the taxation, harassment, or destruction of the populace that refuses to convert. Lying to obtain their goals is not unheard of in their faith.
This Fatwa is not a statement of congeniality. It is a warning to the Terrorist oriented Muslims outside our Hemisphere to lay off the territory these Imams have marked for themselves IMO.
I think the imams’ “announcement” includes coded instructions to al qaeda, et al, i.e., Big Plans.