My upstairs neighbor found out we know her fiancee is a register sex offender but why is that a big deal?

I have been living at my Apartment for four months now with my boyfriend of seven years my sister and her baby, a month after we moved in we got new neighbors a women and her fiancee who at first seemed unordinary to us by their strange behavior apparently she receives social security disability for bipolar schizophrenia and other mental Illnesses also. her fiancee works although by his appearance i thought he would be on social security disability too, plus both are overweight even though that has nothing to do with anything either, we tried socializing with them on a everyday basis her fiancee around the clock and she's always upstairs sleeping or goes to the store is really when we see her besides checking the mail. we had a argument when they called the maintenance man on us saying we were banging which we wasen't she was hearing things) after that everything became more intense like them slamming doors and stumping, she even gave me an attitude over a chinese delivery man delivering her food. because we don't eat chinese food and didin't know if he had the wrong address which has been happening alot lately, she has been taking by ambulance to the psychiatric ward alot lately also and is now on medication. well the other night i was on the internet searching up sex offenders in my state is that is when i realized his name with his picture i was talking to a friend of theirs about this on facebook but he no longer is my friend because running back telling them, anyway one day she came downstairs and knocked on our door and i went to answer it she said i heard you know my fiancee is a registered sex offender how does that make you feel? i paused and said nothing for awhile then finally said i don't care, she replied good and left. i was confused but later forgot on several occasions she asked questions like how did you find out? why is this such a big deal that we know about this? we have a year lease and were not gonna move away because her fiancee is a register sex offender! anyone have any suggestions/advise on this please? thank you-My upstairs neighbor found out we know her fiancee is a register sex offender but why is that a big deal?
This could be a couple different things, they could have social problems, they could be very embarrassed about his situation and probably had to deal with a lot of prejudice of his situation and that may be why she confronted you, if you said something negative, maybe she would have told you to **** off.. .. Being labeled a sex offender is a very difficult thing, as horrible of a crime as it usually is, it sucks that a persons past, or mental health causes so much hatred towards them. They might be people who are quick to react to people, maybe having been through a lot of neighbors in the past who were rude or did things to them or said things... either way, they are probably under a lot of pressure, probably stay away from them unless you find an opportunity to talk with them and let them know that you have no negative feelings towards his situation.. good luckMy upstairs neighbor found out we know her fiancee is a register sex offender but why is that a big deal?
I would avoid them. Just tell her the next time she asks that you were just on the internet and came across it. You just said she is ill and on meds, that's unbalanced. Trust me, they deserve one another.