There are such things as temporary terminals, even all of the large airports have had them at one point so they can handle
increased numbers of passengers (which is possibly something the people at JNIA might be unfamiliar with, so that explains a lot). This helps to maintain/improve levels of service instead of cramming people into crowded existing terminals where they will be uncomfortable. That "hema" as you might call it, handles 2.5 million passengers per year, as the terminal destroyed by fire is rebuilt and expanded. How many does the whole of your kibanda handle? Be honest with yourself and pick a different battle. There is no metric in which JNIA comes close to JKIA - size, number of flights, passenger numbers, facilities... nothing. Show me any, I'll wait... In the meantime, here are a couple of temporary terminals:
Amsterdam Schipol:
London Heathrow