The horns will remain on the Vikings' helmets despite any historical inaccuracy. While perhaps someday, somewhere, the public will thank these researchers for setting the story straight, right now they will only receive sarcasm-laced appreciation for stating the obvious and riding on the coattails of the Minnesota Vikings for free publicity. People already realize not every single Viking plundered for a living. However, not many ethnic groups controlled most of Europe for 250 years. Sure, there were peaceable Vikings, but there were also powerful, war-mongering Vikings who regularly crushed their opposition.
All cultures have groups who do the more mundane work and groups who have the exciting jobs.
Today we are not so different from the medieval Scandinavians.