What is opinion in VEDAS about the meaning of 'ONKAAR' uttered in HINDUISM & SIKHISM?

There is great description about the word 'ONKAAR' in Mandukya & Prasn books of Vedas.
1:-Unmanifested form of God ( also called as SHIVEM) is 'Onkaar',
2:-Physical form of energy emerged from God is called as 'A' and VAISWANER.
3:- Mental form (including emotions) of energy emerged from God is called A's' and TEJUS.
4:- Spiritual form of energy emerged from God is called as 'M' and PRAGYA.

So, as per Vedas, this entire manifested creation(spiritual & non spiritual) is also A U M i.e. AUM( uttered as OM).

So, this entire creation( including spiritual & non spiritual) along with original unmanifested form of God is nothing but "EK ONKAAR".

Difference between OM n ONKAAR is :-
No doubt both words are same in meaning.BUT......
OM word usually uttered in HINDUISM which means GOD... Uttering OM is taking GOD's name or u can say Hagan KO ya ad Karna ya Nam Lena.
In SIKHISM ONKAAR uttered along with EK i.e, EK ONKAAR which means that GOD is ONE n present in each n every thing of this UNIVERSE even in small dust particles too. GOD is also present there...n performing while present in each n every thing. The ENCYCLOPEDIA of SIKHS i.e, SHRI GURU GRANTH SAHIB JI is starting with EK ONKAAR which means RABB IK HAI, OMNIPRESENT HAI, HUM SAB MEIN PRESENT HO KAR APNI BANAI KUDRAT KO DEKH RAHA HAI......

Thinking about the meaning of Omar is same as thinking about the meaning of the sound of a frog.
Creating Tiger, Crocodile and Man on Earth to eat other sons like Cow, Goat and Chicken looks sadistic. Calling God the Creator is not an insult to Him?
I would say that the Creator could not be God but a Mad Ghost.

The Patanjali Yoga Sutras declare 'Tasya Vachaka Pranavaha' Pranava (another name for Omkaara) is the symbol of the Divine.

Omkaara is also called Saba Brahman or Sound Symbol of the Ultimate Truth Principle.

Omkaara is described as the condensed essence of all sound forms and mantras in mantra Shasta. The Veda also says: All mantras merge into the Gayatri mantra and the Gayatri mantra merged into the Omkara.