Regarding the editorial "Gun Lobby 'Logic Oct. 22: Our horror over the recent tragedy in Killeen, Texas, should not blind us to far more significant events. A horrific use of gasoline took place in New York in March 1990; an arsonist killed 87 people at a nightclub.No amount of regulation can prevent access to gasoline and the many other means of destruction that modern industry provides. Clearly, as we grope for ways to deal with madmen, we should see that the people who are advocating general restrictions on the availability of firearms are not providing answers. William G. Dennis, Kelso, Wash. Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please address them to "Readers Write," One Norway St., Boston, MA 02115.