Will other nations exit European Union?

The European Union seems very likely to undergo some pretty powerful changes soon... if the nations can't leave, they will demand it reforms. People can be fooled into believing economic slavery is the price to pay for interconnection, but they will not watch their neighbourhoods being overrun by foreign street gangs and let their public events become news-stories about rapes and terrorism without realizing something is seriously wrong. The right-wing parties will become much more powerful and sweep away the bleeding hearts, let's just hope it doesn't swing so far in terms of nationalism we lose all the humanitarian progress of the last century.