So if a Jihadist comes in and blows up a dam and the resulting water flow floods your house then you will be SOL with no flood insurance?
I don't sell insurance, but I've been screwed by insurance companies enough times to have a pretty good idea.
I'd bet the farm that flood insurance would be invalid if the flooding was caused by a terrorist act. I could be wrong [I'd like to be wrong], but in the absence of expert opinion, that's where my money lies.