I don’t really think it was plagiarised, it actually sounds too similar for it to have been lifted. Artists who plagiarise try to make their productions sound different - inherently pointing themselves out. Especially if the singer hadn’t even heard of Bright Eyes.
My brother is in a band in Madagascar. They wrote a song that has eerily the same melody as ‘Don’t Stop Believing.’ Journey isn’t popular in Madagascar, and so it’s believable that they’d never heard the song.