My boyfriends mum is really disrespectful about my religion. Should I say something or just keep my mouth shut so she looks stupid?

She was talking about how she doesn’t believe in God and Jesus etc and referred to it all as “a load of old shit” and laughed. Then she was like “you don’t believe in angels as well do you? Oh for fucks sake”. I’m open for discussion but I just feel disrespected. But I was in her home so I didn’t argue.

Should I say something next time or just hold back my tongue?
Say something
Stay quiet
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My boyfriends mum is really disrespectful about my religion. Should I say something or just keep my mouth shut so she looks stupid?
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