Hmmm, I don't really agree with this. The Seraphites seem like a pretty obvious Palestine stand-in to me, and while there is some lip service paid to the idea that their ideology has been twisted from its founder's intentions - Lev says that they were never violent until after the Prophet died - it is still largely portrayed as primitive and out of touch with reality, which is not great.
Also, Isaac's goals, and specifically the line "we could try for another truce, but how long until some our asshole on their side or ours breaks it? No, it has to be all of them" to me reads like a pretty obvious commentary on Israel's extremist approach. While I at least appreciate Druckmann acknowledging the extremism here, it still feels a little... I dunno, reductive or simplistic to me.