Hinduism is a works based religion. The problem with Hinduism is the same as any man-made religion, Hinduism doesn’t answer the problem of sin.
If God is holy and just, He must punish our sins. Hinduism doesn’t answer the question of how a just God be the justifier of sinners.
Jesus is the only answer to that. His blood on the cross satisfied the wrath of God over sin.
Now that the justice of God is satisfied, God who is just can also be the justifier of all those who believe in His Son.