Remember, libs of this ilk are cowards at heart. So the answer is likely a high number. He'd instead push for more gun control laws and/or "outreach" programs.
If its his wife or daughter getting raped or mugged, the answer would be "infinity." Just look at what is happening in Norway and Sweden...
You mean emphatically saying in best liberal-whine: "There is no room for violence in this world." isn't enough? ; )