Stoping pvp all together

Code:

@EventHandler
    public void onEntityDamage(EntityDamageByEntityEvent e) {
        if (e.getDamager() instanceof Player && e.getEntity() instanceof Player) {
            Player attacker = (Player)e.getDamager();
            Player attacked = (Player)e.getEntity();
            List<String> guy1 = request.getConfig().getStringList("Truces." + attacker.getName());
            List<String> guy2 = request.getConfig().getStringList("Truces." + attacked.getName());
            if(guy1 == null || guy2 == null) {
                return;
            }
           
            if(guy1.equals(guy2)) {
              e.setCancelled(true);
              return;
            }
        }
    }
}

It currently stops pvp all together, but I do not know the reason for it.

Config for it:

 

May or may not be related... but, I don't think list equality is what you want there. Instead, wouldn't you check that the attacker / receiver was in the other's list? Such as: guy1.contains(attacked.getName()); and vice versa? Although, I figure as long as one succeeds, then you can assume the other.