My logic is "As long as she didn't directly come in contact with the corpse and posed next to them, or went to where they were buried and posed next to them, there is no problem" Meaning that there is nothing wrong with taking a selfie because it is a public place. If it is a funeral, a memorial or a corpse that she posed next to, then that would be genuine disrespect against the dead. In conclusion, nothing wrong was committed here besides the girl's insensitivity to what had happened decades prior. This is all a result of clout chasing, but I don't think it is inherently wrong.