There's a way to kill these damn golem when your sorcerer and he's not affected by any of my magic, or i just have to counter the evil beast?

If i don't kill Klauth, will he come back and hunt my ass down? (chapter 3)

the siege golems? You need to find the wiz that is controlling it. Look for the doors with sparkles around them. Be ready for a big a fight though...

If you are on about the ones in the creater ruins, you have to go back in time and give them a flaw by talking to there human creaters.