Forum:Lava Golem vs Zombie World??

The Golem
Tributes 2 of my opponents monsters in order to SPECIAL SUMMON this one.

Zombie World
Monsters cannot be tributed for a TRIBUTE SUMMON unless they are for zombie type monsters.

the problem
I was called on this play in a tournament before and even tho at the moment it was ruled that i couldnt, the truth still remains unclear. It was ruled by our judge that the monsters woult be tributed for a TRIBUTE SPECIAL SUMMON and because of this, Lava golem cannot be played while zombie world is active as golem is not a zombie. I have done research on other similar cases to find that Lava golem is superior in those cases. For example, if my opponent has scapegoat tokens on their side of the field, and scapegoat does say that they cannot be tributed for a tribute summon, i am still ruled that i am allowed to special summon lava golem by tributing the tokens. now...isnt there something odd here? wouoldnt that in fact mean that Lava golem is NOT considered a tribute special summon? if it were case of it in fact being such, then i could never play lava golem on scapegoat tokens. so if it is not in fat a tribute summon of any kind, then i should still be able to play lava golem while zombie world is actiive, right? Someone out there please come up with some sense in all of this mess >.<