Citizenship is one of those things that you have to think long and hard about. It is like marriage - you really have to think about the person you want to live with the rest of your life...without ever considering the possibility of having a second partner. If you are unhappy with your spouse,then leave them first before starting another relationship...you cannot serve two masters at the same time!!!!!!
Same with citizenship - you have to consider carefully which country you wish to 'belong' to. Once you have made up your mind,then you have to drop your loyalty to the current one and dedicate yourself to the new country of choice.
But then again,there is the interesting case of Obama whom many Kenyans consider to be their countryman yet he is a US citizen,by birth! This is the principle used by Israel. According to Israelis,all Jews wherever they live,are Israeli citizens - whether they have papers to that effect or not!
In my view,if I ever decide to take any other country's citizenship,I will surrender my Kenyan one immediately - whether or not the law will allow me to hold dual citizenship.
For that reason,I don't understand why people are asking for dual citizenship.
Nothing is real unless it can be named; nothing has value unless it can be sold; money is worthless unless you spend it.