"This is not a healthy situation either for Frank or for the team. It doesn't help him or the other players."
Barnes added: "Frank is an England player and we all want England to do well, the problem is this sort of thing does transmit to the rest of the side.
"As much as the other players will be happy they are not the ones being booed, it is not a positive situation for any of them.
"Having been someone who has been through that situation where you have been singled out by England fans, it's not a good situation to be in."