I've visited a few IWGC sites over the years all over the world and I honestly believe the British have done it better than anyone else. I've seen Sikh and Maori gravestones and ones where Moslems have been carefully orientated to face towards Mecca. I think they're really looking at some of the generic " 100 soldiers of the 1st East African lie here" type. But especially on the WW1 memorials there are a lot of people of all colours and creeds just remembered as names on an enormous list of the dead.
Everyone who died, whatever side they died on, deserves remembrance