Why Does Gaara's Father Hate Him?

Gaara’s childhood was filled with lies and betrayal. But why does Gaara’s father hate him?

Gaara’s father has hate for hate him because he couldn’t control the One-Tailed Shukaku. The tailed beast’s sand was attacking villagers, and with Gaara being used as a potential weapon anyways, his father called for his removal.

The One-Tailed Shukaku was implanted within Gaara at birth. The sealing process took his mother’s life as he was born.

In chapters #129 through #132, Gaara’s childhood backstory is explained. He had a tailed beast sealed within, making him a jinchuriki-child along with Naruto. Gaara’s mother did not survive his birth and he was largely raised by his aunt, Yashamaru, under instruction by the Fourth Kazekage.

Plot Behind Gaara’s Father Having Hate For Him

Gaara’s experience as a jinchuriki was worse than Naruto’s. Whereas Naruto was ostracized and generally ignored by the public, the strength of the One-Tailed Shukaku sealed within Gaara would lash out and hurt those around him.

While sitting on a rooftop, Gaara is confronted by a masked shinobi on the attack. His protective sand blocks the thrown weapons and Gaara crushes the ninja with his sand-coffin technique.

The ninja was his aunt, Yashamaru. Gaara’s father, the Fourth Kazekage, orders her to attack him.

You, Lord Gaara… In whom the Shukaku was implanted while you were still in the womb… had been watched over and guarded until now as an experimental subject.
Yashamaru to Gaara | Chapter #130

Gaara’s father purposely implanted the One-Tailed Shukaku into his child in order to create a military weapon.

However, if you cannot learn to control the sand that is the power of the Shukaku Wraith, you will eventually become too dangerous for the village, Lord Gaara.
Yashamaru to Gaara | Chapter #130

The frequent and increasingly out of control attacks on villagers by Gaara’s sand was becoming a major issue. Only thinking of his son as a test subject, Gaara’s father called out for his removal without a second thought.

I took the life of the woman I was supposed to call mother in the process of being born, in order to become the world’s strongest shinobi… an incarnation of sand was implanted inside of me.
Gaara to Himself | Chapter #129

So that’s the answer. Gaara’s father does hate him because he couldn’t control the One-Tailed Shukaku sealed within him. It grew more and more out of control, so he father called for an assassination.