The Jutes are oft overlooked when talking about the Germanic settlement of England, but they hailed from Denmark proper just as the Viking invaders did. Additionally, they were directly adjacent to Wessex, so were there strained relations or fears that they might ally with the Danes? Were they considered fellow countrymen?
In short, none, because the "Jutes" never existed as a distinct cultural entity to begin with, neither did the Angles or Saxons, and the people who lived in Jutland were assimilated into Norse society by the 8th century.
Check out this old answer one a similar topic that I wrote a while back!