>> Are they rodfim? Is it muttar to kill them?
Again, subject to previous conditions, you should use least extreme measures you can. Traditional measure is to isolate from the society. Frankly, this already happened. A lot of people who can do it moved recently out of big cities. So, if you or I live too close to people who do not follow the rules, we should maybe just move. Of course, there are people who, for various reasons, are not able to move.
>> if everyone else is vaccinated, why would they care if some weren’t?
If sizeable portion of population (20%) will not vaccinate, then pandemic will continue at reduced rates (20%?) level and will be endangering even those who are vaccinated. I hope it will be soon known whether one can rely on antigen tests to see who really acquired immunity, then at least we will know who should be more careful – or maybe take extra vaccines …