They were tortured and brought in because they proselytized.

splitting hairs but they weren’t put in bad spots because he wanted to torment missionaries. He had an agenda to prove and using the sister missionaries as a vessel for his agenda was just the easiest way as they would go to his home.

Did they get tortured? Yea. Tortured due to being Mormon? No. Tortured because he had some crazy ideas they wouldn’t agree with, yes.