No one has been made safer by being "proactive" and conquering, or tried to conquer, Iraq.
In fact there are nearly 4000 Americans that are now dead because of the invasion, and thousands more crippled and blind, legless, armless and insane.
Every war brings tragedy. The first Iraq War produced Tim McVeigh. Every month or so, we hear of some nut or another whose PTSD or other disorder causes him to shoot people, murder a wife, or die of "suicide by cop".
When there is no war, these things do not happen.