The one you're fighting belongs to Christ (1.Cor 3:21-23)

So then let no one boast in men. For all things belong to you, whether Paul or Apollos or Cephas or the world or life or death or things present or things to come; all things belong to you, and you belong to Christ; and Christ belongs to God. (1.Cor 3:21-23)

We've established that the bride of Christ is provided for. There’s no need that compels you to fend for yourself against your fellow servants. You, the church, belongs to Christ. You are his bride, and all that is His is yours.

What’s more, consider who you’re fighting against. They are your fellow servants, and the bride of Christ. Now if I were to come home from work and find someone attacking my wife, what do you think would happen? I would fight until death if I had to (and considering my physique that is not an unlikely outcome). What do you think will happen if Jesus finds you attacking your fellow servants when he returns? His most priced possession, paid for in his blood. Actually the Bible tells us.

But if that evil slave says in his heart, 'My master is not coming for a long time,' and begins to beat his fellow slaves and eat and drink with drunkards; the master of that slave will come on a day when he does not expect him and at an hour which he does not know, and will cut him in pieces and assign him a place with the hypocrites; in that place there will be weeping and gnashing of teeth. (Matt 24:48-51)

Do not let him return to find you beating your fellow servants over nothing.