Take damage when hitting a object

I have a object (bush) with this script.
And I whant the car (Player1 or Player2) that hit the bush to take damage.
As it is now both cars take damage.

/Henrik


using UnityEngine;
using System.Collections;

public class Bush : MonoBehaviour
{

public int healthValue;
public DamageHandler damageHandler;
public DamageHandler2 damageHandler2;

void Start()
{
{
GameObject damageHandlerObject = GameObject.FindWithTag("Player1");
if (damageHandlerObject != null)
{
damageHandler = damageHandlerObject.GetComponent<DamageHandler>();
}
if (damageHandler == null)
{
Debug.Log("Fail!");
}
}

{
GameObject damageHandler2Object = GameObject.FindWithTag("Player2");
if (damageHandler2Object != null)
{
damageHandler2 = damageHandler2Object.GetComponent<DamageHandler2>();
}
if (damageHandler == null)
{
Debug.Log("Fail!");
}
}
}

void OnCollisionEnter2D()
{

if (GameObject.FindWithTag("Player1"))
damageHandler.AddHealth(-1);


GameObject.FindWithTag("Player2");
damageHandler2.AddHealth(-1);


}

}