How can Referendums Unite and Divide Societies?

-Unity in the form from the Decisive Result on 1998 Belfast Agreement. A Strong Vote with a High TO can leads to Unity -But Referendums can also Cause Cracks to show off in the First Place. 2016 saw Divided between Scotland [Remain:62%] and England [Leave:59% No London] -Age Groups also Divided in 2016. 27% of 18-24 yr wanted Leave while 60% of 65+ yr. -Racial Tension also Rose, as Police had Reports rise in Race-Related Hate Crimes after 2016