I don’t know him or the context in which it was posted, but that post didn’t look offensive or disrespectful to me. If anything it sounded like good advice that life is precious so don’t take it for granted and make every moment we have on this earth count. Don’t be afraid of death or you will end up being afraid to live. Also that although we will all grieve the loss of a loved one, we must also be grateful for the time we had with them.
That’s just the way I read it anyway…