I think they're not exactly mad at the unvaccinated. They're taking it out on the unvaccinated because they're frustrated & angry at themselves for buying into the fear, lies & B.S. we were all given.
My nephew was so angry at me, he insulted me because I chose not to be vaccinated. He gave me the same robotic B.S. he was fed & he accepted it - that the vaccine protects & those who don't get it are selfish & inconsiderate because they're making others sick.
BUT, after his whole family (all vaccinated & boosted) got Covid - his two kids, his wife, & his father & mother in law - some very ill, he got so angry, he wouldn't speak to me. Why? He was all ready to tell me, "See? Told ya so. Unlike you, we're all smart enough to be protected by the vaccine."
His anger is due to his disappointment at not being able to gloat over it.