It's an unholy mixture. It started with critique against the restrictions due to Covid 19, but it escalated from that point on. Comparison of unvaccinated people and jews under the Nazi regime are what's happening in some of those Telegram channels these days and that's against german law, yes.
Many of the Telegram channels of the covid-deniers actually escalated to open calls for murder, not just antisemitic comparisons (which are bad enough on themselves).
