Should I reconsider my relationship if his own mother is warning me about him?

Anonymous
I've been noticing a couple signs and my parents don't like him. This surprised me because they aren't judgmental people nor the type to gossip about others. They voiced their concern once (they hate repeating things), said they wouldn't meddle but for me to analyze things.

Then red flag:
I actually spoke with his mother recently. She first asked if I was really happy with him and then told me that her son has always been an odd child. He used to be mean to his classmates (sometimes going beyond the ''kids can be cruel'' limit). He got expelled from school once. His previous relationships didn't last more than 4 months; sometimes it would be over within weeks. She claimed her child isn't really the sweet angel he acts like. Her voice sounded of concern.
Updates
+1 y
I'm getting kind of worried. That's the only single guy my parents ever disliked. Then, his own mother isn't even covering up for him either.
Updates
+1 y
Guys I'm breaking up now. Each new information revealed just keeps getting worse. He scammed others, never returned $5000 he stole from his ex girlfriend and as a kid displayed indifference towards others and animals.
Should I reconsider my relationship if his own mother is warning me about him?
16 Opinion