I can understand your feelings to a point. He should have been fully vaccinated. Rahm apparently wasn't vaccinated but maybe thought he was 'OK' as he apparently had Covid about a year ago. Maybe he thought he was 'good' because of it. A lot of people unfortunately feel that since they've had it, they don't need to get vaccinated. It was probably a bit of a fluke that he got it again but there is about a 10% chance of getting it twice. I'll bet Rahm is far smarter on the subject now.
But the thing is, getting fully vaccinated is important both if you've already had Covid or not. If you've had it it will boost your immunity toward getting it again (rare), but it should also protect you from these upcoming mutant strains like the current Delta variant of Covid. and it protects others from getting it (the main thing people don't understand).
Unfortunately a lot of people just don't think they need it. They're either selfish, misinformed, or both. If more people got the vaccine we wouldn't be having these issues and there wouldn't be these mutant ninja variants. And yes for a lot of younger people, they probably think it won't kill them or it will be mild if they do get it. But how would you like to take the risk of losing your sense of taste and smell, maybe for life for some? Or giving it to someone else because you are selfishly spreading it?
Chew on that when thinking if you need the vaccine or not. If you still don't think you need it, do it for others around you!