Was this a set up?

So i get a random friend request on facebook. I accepted it because i thought he looked quite cute. Few minutes later i get a message from him saying that his daughter was playing with his phone and added me. I was like okayyy 🙄. So i said no worrries and put a laughing emoji. He then replies saying hes glad i found it funny and feel free to remove him if i want. It was said in a joking way because of the emojis he sent. So anyway, i said i wouldnt remove him, unless he wanted me to obviously 🙄. Then i went snooping on his page only to find my fucking ex who ive recently split from is his friend!!! I cant help but think hes got something to do with this, so i blocked that guy and deleted the messages. I havent got time for that shit

Would my name come up as people he may know if we have no mutual friends and come from different towns?

Can i also mention that my ex was emotionally, mentally and physically abusive. And i feel this is the kind of thing he’d do just to have a laugh at my expense