First, these incidents are extremely rare. A handful only - which given the thousands of crossings over several years is testament to the remarkable tolerance of G/Cs. Especially when you consider that our land in the north is under occupation.
Second, no-one is excusing any assault on visitors to the free areas. Most G/Cs are proud of how prosperous, cosmopolitan and tolerant the free areas have become. T/Cs should come and see what they are missing out on.
If a few hot-heads have reacted it's unusual but in a sense understandable. Things are not normal in Cyprus. Opening the crossings does not solve the issue of the occupation. Until Turkey leaves, then things will remain on edge. Turkey's presence in the north is a huge provocation in itself. That's the way it is. No point in kidding ourselves that the problem is anything but the result of the continuing occupation of our country.
Did the GCs actions contribute to the "problem" you refer to?