What happens when pigs blood is poured on a Muslim grave?

I'm muslim.........first of all this's not exsist in ISLAM it's just a diny and if it happen ALLAH will punish who pour blood or meat or any thing of either pig or horse or any another animal not just the swine and also if they put upon the grave sth like stone or stick or........in ISLAM who died must to bury just bu ground/soil as our prophet MOHMED did before b/c he is our example we do what he did and we don't do what he didn't do