There's a problem and solutions with consequences. Every law limits freedom in one way or another. It's a case of how probable and sever is the problem compared to the consequences of the law.
In Germany the problem is Nazis and a choice about how to stop them doing it again. We have seen that such people can convince nearly an entire population (so the problem is likely) and start a world war (so the problem is extreme). Why would anyone debate the need for a law that limits a freedom in a case we consider pretty unworthwhile anyhow (limiting the freedom to deny the holocaust).
As for vaccines it's again a calculation where we know the problem is extreme (huge economic losses and deaths) and the likelihood increases based on how many people don't vaccinate - or whether people in specific jobs don't vaccinate. The calculation shouldn't be that hard.
In Germany the problem is Nazis and a choice about how to stop them doing it again. We have seen that such people can convince nearly an entire population (so the problem is likely) and start a world war (so the problem is extreme). Why would anyone debate the need for a law that limits a freedom in a case we consider pretty unworthwhile anyhow (limiting the freedom to deny the holocaust).
As for vaccines it's again a calculation where we know the problem is extreme (huge economic losses and deaths) and the likelihood increases based on how many people don't vaccinate - or whether people in specific jobs don't vaccinate. The calculation shouldn't be that hard.