Mum was only diagnosed with Alzheimer's in June this year. However I've noticed she's been laughing at inappropriate things or images. For example in town a few weeks ago there was a severely disabled young man with carer walking and vocalising loudly. Mum laughed at him. I told her it was inappropriate as he couldn't help it as he was disabled. She said she hadn't realised he was disabled and thought it was funny. Today whilst watching the news we were watching a piece on the refugee crisis and a father was being torn away from his wife and baby in a train station in Hungary. At one point he was hanging on to his wife's clothing with his teeth in order to try and keep them together. This image made mum laugh again. My question is, do I tell that what she's laughing at are serious issues or is she just reacting to what she can see or hear 'in the moment' as it were and not seeing the big picture? Should I tell her or is ignorance bliss in this instance?