Thank you @Bunpoots , i really appreciate your input! It is difficult to deal with, isn’t it? Itm sorry to hear about your mums delusion too, I will try your suggestions!Welcome to Dementia Talking Point @Birdie45
The staff are correct in saying your dad’s behaviour is common for someone with dementia, as are delusions, but I can imagine how distressing it is for you and your sister as well as your dad.
As “his moods vary” have you asked the staff how much of the time your dad seems distressed. If he gets worse in the afternoon/evening this is very common and known as “sundowning”. It would probably happen in his own home too.
My mum suffered the delusion that one of the doctors while she was in hospital was out to get her and nothing we said could convince her otherwise but it did eventually pass. I think it was the clipboard he carried that upset her.
Sometimes saying that you will sort the situation out is enough to calm the PWD...even if there is nothing to sort. I think it’s worth talking to the staff to see if there is any one who your dad trusts who is willing to do a bit of play-acting and “sort out” the “bad” people for him and make him feel calmer.
Sometimes medication may be needed as a last resort.