Weird thing happened with siri. [View all]

I was face-timing with my niece on my I-pad pro. Had my mini-pad closed and charging next to it. We were talking about trump. I said he's not just an idiot, he's evil. Siri from the closed mini says "that's not nice". My niece says who said that, shocked kinda knowing it was Siri.
What really bothers me about this is, if I had been talking about Manson or Jeffrey Dahmer, would Siri have piped in. Or did she just do it because she understood the context of what I was saying about trump. And since when can Siri allowed to be critical of me.