Can someone explain the concept of anti-zionist jews for me, from a religious perspective

Hi, non-jew here. I was watching something on YouTube about your haredi jews. Towards the end of the video, it had some shots with these people holding anti-Israel protest signs (while living in Israel) and also saying that they’re anti-zionist and that zionism is evil etc

Can someone please explain to this non-jew why a Jewish person would be against the concept of a Jewish state? It really surprised me that they exist. Thanks