Judaism Yesterday and Today

Ever wonder if there was a difference between the Judaism that set the stage for Christianity, and the Judaism of today, and if so, what are they?

https://www.sefaria.org/Sanhedrin.77a.3?lang=bi

https://www.sefaria.org/Keritot.11a.14?lang=bi

https://www.sefaria.org/Ketubot.11b?lang=bi