What is the difference between the doctrine of indwelling (Hulul) and the doctrine of union (Ittihad), and which of the two is more misguided?

The questioner:
May Allah reward you, Honorable Shaykh. This questioner asks: Is the doctrine of indwelling (Hulul) more misguided than the doctrine of union (Ittihad)?

The Shaykh:
No, the doctrine of union (Ittihad) is more severe. Yes.

The questioner:
May Allah reward you, and he asks: What is the difference between them?

The Shaykh:
The proponents of indwelling (Hulul) say that Allah dwells in everything. As for the proponents of union (Ittihad), they say that everything is Allah; everything is Allah, even dogs and pigs are Allah in their view. Existence is Allah, but if you affirm two existing things, you are an associate of partners with Allah (mushrik) in their view. Yes.

The presenter:
May Allah reward you, Honorable Shaykh. This is a questioner, the seller.

The Shaykh:
Regarding these troubles, but you have cut us off from them. Yes.