Depends.

Political harmony is a problem if forced, but a common vision shared by much of society is a strength if arrived at through healthy, intellectually honest debate.

Political debate is fine and healthy, but it should not be possible to end a debate by being louder, more obnoxious and more ready to do violence than the other debaters.

Of course, but having lived in a lot of “politically harmonious countries” I’ve noticed it’s not harmonious due to some universal belief in the political system, but a combination of political apathy, learned helplessness, political oppression (often subtle) or some cultural belief that you don’t question leaders or that they possess some special attributes that no one else does.