What is the actual reason behind the Nine Tails attack?


In the anime, the nine tails were summoned by Madara/Tobi during Naruto's
birth and made to attack Konoha. Later Minato saved the village. For what
reason the nine tails was made to attack Konoha?




Madara/Tobi had taken control of the Nine-Tails, but during his battle with
Minato, Minato removed the Nine-Tails from the control of Tobi. Then Tobi
escapes from the battle.

This is where the Nine-Tails was summoned by Madara/Tobi in Konoha (chapter
502):

![enter image description here](https://i.stack.imgur.com/sX8SL.jpg)

![enter image description here](https://i.stack.imgur.com/CZD1x.jpg)

This is when Minato removes the Nine-Tails from the control of Madara/Tobi
(chapter 503):

![enter image description here](https://i.stack.imgur.com/ForUv.jpg)

This is when Madara/Tobi escapes:

![enter image description here](https://i.stack.imgur.com/Vmfpd.jpg)

Now, since no one was present to control the Nine-Tails, he went on a rampage
and thus attacked the village.

Initially, Madara/Tobi wanted to keep control of the Nine-Tails and use its
power for himself, and destroy Konoha. But now the Nine-Tails was a loose
canon destroying Konoha on its own free will.

> After Rin, who was someone very special to Obito, was killed, he was taken
> by hatred towards the Ninja world. Uchiha Madara had for long contained
> hatred for the Senju clan. After his defeat in the hands of the First Hokage
> - Hashirama Senju, had made the destruction of Konoha his vendetta. Madara
> saped into this hatred of Obito and toned Obito's thoughts to suit his own
> needs. When Madara/Tobi learned that Kushina is about to deliver a child,
> they made their move, as the time of delivering the child is when the seal
> is the weakest for a Jinchuruki. Having a Tailed Beast in his disposal would
> have been a great advantage for Madara, as he was already planning something
> that concerned the Bijuus.

Thus Madara/Tobi attacks Konoha, and in turn the Nine-Tails attacks Konoha.

