VS: I would ask you to read the Gita first.....to begin with.... and because you went into accusation I would say u read the Quran and the Bible.
THEN COMPARE THEIR MESSAGE AS YOU UNDERSTAND IT
Is that fair enough for you. I am not even asking u to read the Shrutis (Vedas, Upanishads) or any of the dozens of Smritis and Puranas or the works of Sikh, Jain and Buddhist gurus and rishis. I understand that it would be too much information for readers of hate "pocketbook" like Quran.
If you do not have the capability or understanding to read that much then visit the following sites to do a comparative study.