Got decreasing health if attack other object

Getting Started
1

I added a tree controller script to make tree die and spawn logs but now it dies and spawn wood even if I attack something other than tree . It dies if I just swing my mace even though iam not aiming the tree . why this happens ? and also it would be better if someone tell me how to make tree fall and then destroy the tree not just destroy when I attack . I want it to fall down and then spawn woods. here is the TreeController script

#pragma strict
var treeHealth :int =5;
var logs :Transform;
var tree :GameObject;

var speed :int =-8;
function Start ()
{
tree = this.gameObject;
GetComponent.().isKinematic = true;
}
function Update()
{
{
if(treeHealth ← 0)
GetComponent.().isKinematic = false;
GetComponent.().AddForce( transform.forward * speed);
DestroyTree ();
}
}
function DestroyTree ()
{
yield WaitForSeconds(7);
Destroy(tree);
var position : Vector3 = Vector3(Random.Range(-1.0, 1.0), 0 ,Random.Range(-1.0 , 1.0));
Instantiate( logs, tree.transform.position + Vector3 (0,0,0) + position, Quaternion.identity);
Instantiate( logs, tree.transform.position + Vector3 (2,2,0) + position , Quaternion.identity);
Instantiate( logs, tree.transform. position+ Vector3 (5,5,0) + position , Quaternion.identity);

}
and sorry for not using tags cause got the problem

2

first of all you have insert code at top of thread/reply zone
second problem is not here obviously as this is only tree and mace, it handles trees behaviour and in mace script you control trees health so this code is of no help.
third you can replace tree with some tree object that is rigidbody and when falls it turns into logs