How do I make my tool anti teamkill?

Hello, I am trying to make a zombie tool for my zombie game, and I got a tool that is a axe that i edited around to make it into a zombie tool, since i am a beginner scripter. However, I am having trouble for making it anti-team kill.

Here is the main script:

local Tool = script.Parent
local Axe = Tool.Handle

`local vCharacter
local myTorso
local myHumanoid

local leftAxe
local leftAxeWeld

local slashSound

local leftAxeConnection

Tool.Enabled = true

local axeDamage = 8

local damage = 10

local debris = game:GetService("Debris")

function tagHumanoid(humanoid, player)
    if humanoid ~= nil then 
        local creatorTag = Instance.new("ObjectValue")
        creatorTag.Value = player
        creatorTag.Parent = humanoid
        creatorTag.Name = "creator"
        debris:AddItem(creatorTag, 1)
    end
end

function slash(hit, arm, kamaHandle)
    local armWeld
    if hit and hit.Parent and vCharacter then       
        local humanoid = hit.Parent:FindFirstChild("Humanoid")
        vPlayer = game.Players:GetPlayerFromCharacter(vCharacter)       
        if humanoid ~= nil and myHumanoid ~=nil and myHumanoid ~= humanoid then             
            if arm == nil then              
                arm = vCharacter:FindFirstChild("Right Arm")
            end
            if arm then                 
                armWeld = arm:FindFirstChild("LeftGrip") or arm:FindFirstChild("RightGrip")
                if armWeld and (armWeld.Part0 == kamaHandle or armWeld.Part1 == kamaHandle)  then                   
                    tagHumanoid(humanoid, vPlayer)
                    humanoid:TakeDamage(axeDamage)
                end
            end 
        end
    end
end 

function blow(hit) 
    if hit and hit.Parent then 
        local humanoid = hit.Parent:FindFirstChild("Humanoid") 
        if humanoid and myHumanoid and humanoid ~= myHumanoid then 
            tagHumanoid(humanoid, vPlayer) 
            humanoid:TakeDamage(damage)             
        end 
    end 
end 

function onEquipped()
    vCharacter = Tool.Parent
    myTorso = vCharacter:FindFirstChild("Torso")
    myHumanoid = vCharacter:FindFirstChild("Humanoid")
    myLeftArm = vCharacter:FindFirstChild("Left Arm")
    if myTorso and myLeftArm and vCharacter:FindFirstChild("LeftAxe") == nil and leftAxeWeld == nil then 
        leftAxe = Axe:Clone()
        leftAxe.Name = "LeftAxe"
        leftAxe.Parent = vCharacter     

        leftAxeWeld = Instance.new("Weld")      
        leftAxeWeld.Part0 = myLeftArm
        leftAxeWeld.Part1 = leftAxe
        leftAxeWeld.C1 = CFrame.new(-1, 0, -1.9, -1.31134158e-007, -1, 2.18556949e-007, -1, 1.31134158e-007, 4.3711367e-008, -4.37113989e-008, -2.18556949e-007, -1)
        leftAxeWeld.Parent = myLeftArm 
        leftAxeWeld.Name = "LeftGrip"

        leftAxeConnection = leftAxe.Touched:connect(function(hit) slash(hit, myLeftArm, leftAxe) end)
    end 
end

function onUnequipped()
    if leftAxe then leftAxe:Remove() leftAxe = nil end
    if leftAxeWeld then leftAxeWeld:Remove() leftAxeWeld = nil end
    if slashSound then slashSound:Stop() end
end

Tool.Equipped:connect(onEquipped)
Tool.Unequipped:connect(onUnequipped)

Axe.Touched:connect(function(hit) slash(hit, nil, Axe) end)

local throwAxes = Tool:FindFirstChild("ThrowAxes")
while throwAxes == nil do 
    wait() 
    throwAxes = Tool:FindFirstChild("ThrowAxes")
end 

function throw(axeClone, direction, axe) 
    local spawnPos = axe.Position + direction * 4.0 
    axeClone.CFrame = CFrame.new(spawnPos, spawnPos + direction) * CFrame.Angles(0, 0, math.pi/2)   
    axeClone.CanCollide = false 

    axeClone.Velocity = direction * 65.0 
    --axeClone.RotVelocity = Vector3.new(100, 0, 0) 

    local floatForce = Instance.new("BodyForce") 
    floatForce.force = Vector3.new(0, axeClone:GetMass() * 196.1, 0) 
    floatForce.Parent = axeClone 

    axeClone.Parent = game.Workspace 

    print(axeClone)

    axeClone.Touched:connect(function(hit) blow(hit) end)   
    debris:AddItem(axeClone, 5)
end 

throwAxes.Changed:connect(function()
    if throwAxes and throwAxes.Value == true and myHumanoid then 
        Tool.Enabled = false
        local target = myHumanoid.TargetPoint 
        local direction = (target - myTorso.Position).unit

        local axeClone = Axe:Clone()
        throw(axeClone, direction, Axe) 
        wait(0.25)
        local axeClone2 = Axe:Clone()
        throw(axeClone2, direction, leftAxe)
        Axe.Transparency = 1.0
        leftAxe.Transparency =  1.0
        wait(5.0)
        Tool.Enabled = true 
        Axe.Transparency = 0.0
        leftAxe.Transparency =  0.0
        wait(2.0)
        throwAxes.Value = false
    end 
end) `