The forum is showing that while there is a large sentiment for reunification, simply joining together two halves without addressing the cause for the separation in the first place is not likely to settle the problem. The Israeli-Palestinian problem is a good example of this. In the 1948 War of Independence, Jerusalem was divided between a Jewish West, and an Arab East. The Six Day War on 1967 rejoined the two halves into one city, but there is still - in the Arab East Jerusalem (or Al Quds, depending who you talk to) - a desire to break off.
With this example, lets look at Nicosia/Lefkosia/Lefkosa. If there is a forced settlement and the city's northern and southern sectors are rejoined at gunpoint, it would still leave basically two antagonistic halves.
Reconciliation must be the first goal if any attemp at forming a united Cypriot Republic is to succeed. But what kind of confidence building measures can be taken, given either sides' distrust of each other? The alternatives are not palatable.