Keep the real world religion talk out of it please.The original paladins in history/mythology were Christian holy knights who fought Muslim invaders during the Crusade era. So calling them "jihadist" is not that far from a simple statement of fact. There's room for disagreement, but it's hardly trolling.
Clerics are trickier because there's a lot of Van Helsing in that mix. But ultimately the concept of a holy warrior who beats evil with a hammer is pretty inextricable from the Crusades. Admittedly, clerics and paladins hit different in a world where objective evil like trolls and undead exist, instead of "evil" just meaning "humans who have a different religion". But still.
Steering this back on topic... does the Seraph class wash away those associations? Seems to me that it does. It nicely embodies the paladin playstyle without any of the baggage of the traditional paladin. It's also just more fun that they started from scratch. The Divine Wielder's ability to fling their weapon like Thor is unlike anything in D&D lore, and more power to it.