There are many Christians that wish for the death of particular politicians.
These Christians unfortunately don't understand what Jesus taught about loving others, being willing to die for those that hate you, or following the example of Jesus when he healed the ear of the soldier that was arresting Him.
These Christians are choosing to follow the teachings of other ministers that have chosen to ignore what Jesus taught, and re-interpret it with their corrections.
So, since 1 Cor 13 is quite clear on this, in that if you don't have love then what you say is like a clanging gong. Without love nothing you do means anything to God.
Unfortunately there is no way to really sugar-coat this response, as these Christians are damaging the teachings of Christ by preaching a doctrine of hatred and intolerance.
One book that heavily influenced me, in that it showed me that there are others like me was "Jesus Freaks", both vol 1 and 2 (http://www.jesusfreaks.net/), to see not only stories about people willing to die for Christ, but those that made the huge risk to be willing to live for Christ, risking a great deal while they do that.
When Osama bin Laden was killed I was actually torn, as I felt guilty for being happy he was killed, and I struggled with how I should feel. If he was captured it would lead to more deaths, so I don't see any good solution other than what was done, but being happy seems to be wrong.