You are killing innocent cows and other animals--nature will take revenge. Just wait. As soon as the time is right, nature will gather all these rascals and slaughter them.

JSD 6.5             Slaughterhouse Civilization
Eat hogs. We don't prohibit the killing of these less important animals. We neither sanction nor prohibit. But especially we request cow protection, because it is ordered by Lord Krsna. Go-raksya: "Protect the cows." That is our duty.
   And economically, also, it is very useful. Krsna has not recommended this for nothing; it is not like that. Krsna's order has meaning. The cows on our Hare Krsna farms are giving more milk than other cows--because they are confident, "We will not be killed here." It is not like these rascals, these so-called Christians, say: "They have no soul; they have no intelligence." They have intelligence. In other places they do not give so much milk. But on our farms they are very jolly. As soon as the devotees call, they'll come. Yes--just like friends. And they are confident, "We'll not be killed." So they are jubilant, and they are giving much milk. Yes.
  In Europe and America the cows are very good, but the cow-killing system is also very good. So you stop this. You simply request them, "You'll get the cow's flesh. As soon as she is dead, we shall supply you free of charge. You haven't got to pay so much money. You can get the flesh free and eat it then. Why are you killing? Stop these slaughterhouses." What is wrong with this proposal?
  We don't want to stop trade or the production of grains and vegetables and fruit. But we want to stop these killing houses. It is very, very sinful. That is why all over the world they have so many wars. Every ten or fifteen years there is a big war--a wholesale slaughterhouse for humankind. But these rascals--they do not see it, that by the law of karma, every action must have its reaction.
    You are killing innocent cows and other animals--nature will take revenge. Just wait. As soon as the time is right, nature will gather all these rascals and slaughter them. Finished. They'll fight amongst themselves--Protestants and Catholics, Russia and America, this one and that one. It is going on. Why? That is nature's law. Tit for tat. "You have killed. Now you kill yourselves.