if the vaccine actually worked
Personally, I think the vaccines work to some degree.
But my issue has always been the short term, mid term, and possible long term side effects.
The pro-vaxx people have repeatedly made it about whether or not they work against Covid in the short term; they have pretty effectively silenced people like me who have other concerns.
vaccinated people feel so threatened by non vaccinated ones
The propaganda that has driven this is interesting. As you said, it really makes no sense for vaccinated people to fear non-vaccinated people. But logic has been tossed out the window.
The MSM and the government have worked well together to foster anger and resentment and blame all towards non-vaccinated people from the vaccinated people. The questions are
"Who is controlling the government and the MSM?",
"Is it the same entity?", and
"Why do it? What is the big picture plan?"