They have no right to do this to the rest of us.
As a human rights advocate, though, curious: where is the line, in everyone's mind? Can we use the law on people who don't wash their hands after they use the restroom? Etc
We certainly did about the 1918 pandemic, where all kinds of limitations were imposed to attempt to control the spread. The cost/benefit with typical seasonal flu is, obviously, not the same.
Analogy: If you play with fire and get burned, that is up to you. If you play with fire and burn your neighbor's house down...
Larger scale: Nobody else should enter a store, because these people should be able to do their thing without "putting anyone else at risk"? That's absurd. They are putting other people at risk, and everyone else shouldn't have to go ridiculously far out of their way to avoid the risk.
[Edit: Oh, yeah. What if I work at the store? At that point, "don't enter the store" is... somewhat lacking as usable advice.]
This is inconsistent.
Either the risk is on them, in which case it doesn't just apply to religion, it should be anything.
Or you think it has risk to the community, but religion should get preferential treatment.