What is the core belief for Sikhism?

Sikhism as a religion believes in the followings:

1.Sikhism believes in One GOD.

2.Sikhism believes Guru Granth Sahib as the last and eternal Gurus of Sikhs.

3.Sikhism believes in Karma- the law of cause and effect.

4.Sikhism believes in Reincarnation.

5.Sikhism believes in Multiple paths to salvation.

6.Sikhism opposes Pilgrimage,rituals practices.