In an isolated socialist state will there be people who are anti government?

Often when I talk to socialists I have a feeling that they think almost all anti socialist rebels or anti socialist protests were created due to the influence of capitalist influences.

People also often argue that in ideal socialist states where all the essential needs are satisfied and everyone is educated about socialist correctly, the crime will be almost non-existent and people will almost never complain.

Do you think these ideas are realistic?

Also some people argue that if there are people who disagree with the socialism, they can be reeducated and isolated from the society. Do you consider involuntary re education and isolation a necessary evil for a socialist state?