If They don’t follow it, it is alright. But if anyone else who does follow it, they are condemned.

“The Christians have their scripture and anyone who doesn’t follow it is a heathen. The Muslims has theirs and anyone who doesn’t follow it is a kafir The Jewish have theirs. Everyone has their scripture, but no one follows it. If They don’t follow it, it is alright. But if anyone else who does follow it, they are condemned. Kali yuga.”

from Lecture – SB 1.5.30 Real Knowledge