Chrissy,
I juggle work and caring. Quite a few of our patients are in care/nursing homes. They nearly all struggle when there are agency staff as they don’t know or understand the residents like the regular staff do. If the agency staff at the old home were mainly black and he got injured, it’s understandable that he reacts when the care is delivered by another black carer. He probably is over generalising, tenses in anticipation and that won’t help.
Is the manager aware of this? Trauma from previous care is a valid reason to request certain carers are avoided. It may be possible to jiggle the rota to avoid black carers delivering his personal care particularly in the morning and they can help with other aspects of his care until he gets to know them and trust them.
The meds and morning issue are tricky. Could he have the meds earlier the night before so they are wearing off earlier so he feels less drowsy? Or could he get up, washed and dressed after your parents have visited? Ideally they’d visit later but sounds like they’re unlikely to want to do that.