If you shatter it's joints it will ignore it (I guess the leg is just connected through magic?) and keep coming.
It will ignore it in the sense of it not reacting in pain or experiencing extra HP damage.
While it is perfectly reasonable for a DM to run a golem as having its leg still connected via magic,
what I actually said upthread was that if you cut it in half, it will crawl towards you.
Conclusion: The actual physical body is meaningless due to the magic binding it. Therefore you cannot harm the physical body.
This is what you are saying.
Either the creature has joints and can be damaged or it cannot be damaged because the physical body does not matter. If it is a physical creature then you can smash joints and dislocate hips.
That is not what I'm saying.
Your conclusion is false, if for no other reason than you're skipping out on a statement, to whit, that the physical body is a material component of the ritual that creates the golem. And just like other magic rituals with material components, enough damage to them will disrupt the ritual's magic. Also like those other rituals, it doesn't matter where you damage it so long as you do- no particular point on a magic circle is more vulnerable to being damaged than any other, for instance.
It is also erroneous because there is a disconnect between its statements: if the body were meaningless (which I don't concede and actively deny), it does not necessarily follow that the physical body cannot be harmed.
If you read the description of their construction, clay, stone and iron golems are animated
sculptures.
SRD
A clay golem’s body must be sculpted from a single block of clay...
A stone golem’s body is chiseled from a single block of hard stone, such as granite...
An iron golem’s body is sculpted...
They are not articulated action figures: they have no joints or hips (in the anatomical/structural sense of having an internal interlocking ball & socket) to dislocate. They are either undifferentiated matter from surface to core (the stone golem) or hollowed out and empty shells (clay or iron) like the statues of similar materials found in museums around the world. Their legs and arms can only bend because the magic makes it possible, not just in the sense of as a magical muscle, but also in the sense of letting the material of the golem actually bend instead of break. A stone golem's construction has more in common with Michaelangelo's
David than with a Terminator. The buried tomb guardian clay statues of China or the Statue of Liberty represent the nature of craftsmanship used to create clay or metallic golems, not the work of puppeteers.
So, I stand by my position: you can damage a golem by striking it- as per the rules- but no spot on it is more vulnerable to damage than any other- as per the rules (of pre-4Ed D&D).