Like, in what context? If we're just talking about harassing shipping, that they're doing this to harm Israel and the actual motivation for that is aiding the Palestinians. That would probably require one to believe that when their leaders say things like, "Arab countries and all Islamic countries will not be safe from Jews except through their eradication and the elimination of their entity," they're merely kidding about the genocide.
I'm not sure how to steelman Islamism generally. Religion doesn't belong in government anymore, this isn't the Middle Ages.