[Microgunner]

Every creature is willing to defend itself. Survival and reproduction are the most basic of instincts.
God did not see fit to equip us with razor sharp claws or teeth, a tough fur covered hide, brute strength, deadly toxins or lightning speed. No, he equipped us with superior intellegence, allowing us to fashion the tools needed to survive, such as clothing, tools, shelter and weapons.
You simply wish to fulfill what your basic insticts are demanding you do. Self defense being one of the strongest.
To do otherwise would be contrary to human nature and a person who denies thier nature is an unhappy person, and in the case of attack, possibly a dead person.