1.   But every so often, such as now, killing does seem the best possible option.

2.   Frankly, in this instance, killing the killers seems a bit mild.

3.   Killing seems so unjust.

4.   Killing seems like just one more option.

5.   Now we have ample evidence that killing murderers seems to deter nobody.

6.   Killing seems to make some people feel that they have the power of life and death over others.