Some religions that call themselves christian shun ex-members. Shunning can go as far as cutting off family, friends, and every other associate. What do you think of that as a Christian response to someone leaving the faith or moving to another?
Depends on the context, and the motivation.
If you knew someone was committing a great evil, would you separate yourself from them?
Similarly, if you had a friend, and they decided to go full on drug dealer or a gang member, or a pimp... would you separate yourself from them?
If you are wise, the answer is yes.
If you hang out with gang members, you could end up rounded up in a sting, and have a criminal record.
Even if you did not, you could end up with a ruined reputation, and cause disgrace on your family.
I had a woman friend years ago, self-proclaimed christian, said she spoke in tongues, and saw angels... she decided she was going to full on cheat on her husband, openly. I tried to talk to her about her evil, and she gave me this "god wants me happy" garbage, and was dead set on doing what she wanted.
Well.. I had to separate from her. I'm a single guy, and she's a wife openly cheating on her husband.... I'm not going to stick around someone like that, and so I got away from her. If I hang out with someone like that, all I'm doing giving everyone that idea that I'm in on this, and worse that this is what the name of Jesus stands for.
So I shunned her... I haven't spoken to her since.
I fully believe that there is a in fact a time and a place for shunning.
Now I don't know if that includes cutting off friends and family, and all associates..... for what cause? That sounds like some sort of cult.