That's to much for an older sibling to do that to a younger sibling and I myself am a older brother you should just not take crap from anyone just ignore your family who's playing favourites.

No the physically impaired seats were in front of me so that was why I was so confused and they were also free.

I think I'm the rude one in this situation even if I didn't mean it and should have asked him to clarify what he said so this awkward situation wouldn't have started to begin with.