IMO, the ones who display hostility towards inactives feel threatened.
Or maybe incredibly jealous (though they'd never admit to it). They're stuck in the same rut that they were stuck in decades ago when you left, and you've moved on. You have real friends who are trustworthy and they have Loyal™ Friends™ who would rat them out to Elders™ in a heartbeat if they had the chance. You have things that they don't have because of the choices they made to Trust In Jehovah™, while you've improved your lot in life without Jehovah's help at all. They're still slogging away, going to Meetings™ and going Door-to-Door™, and you get to sleep in on weekends and go out for breakfast. They still have to sing those *dreadful* Kingdom Melodies™, while you can listen to whatever music you like. They get off on minding other peoples' business so they can trade information about you and curry favor with Elders™ and Elderettes™, while you enjoy the sweetness of privacy and not giving a flying you-know-what about what they think of you.
Of course, they're jealous!