I had a real problem with him in that episode too. It's honestly like he's learned nothing from the Prime Directive. True, it may not necessarily apply to this specific community, but the spirit of it does imho. Those people were fine without him, most didn't want him involved, & all he's really doing is pushing his own ideals onto a group, as if his is the only right choice for them, without exception
Worf is one of the most narrowminded Trek characters ever written. That he ever shows a moment of tolerance & absence of prejudice is looked at as a major breakthrough for him. Case in point, his own son is a quarter Human, raised by a half human mother, & once she's dead, he's does everything in his power to discourage, stifle, & condemn that influence altogether, to the detriment of him