God is one , His names and forms are infinite. If this is understood, there will never be religious fanaticism.
If you respect a true saint from any faith and work for him, God or Khuda, or Bhagawan is happy. If you disrespect a true saint from any faith and work against him, God or Khuda, or Bhagawan is unhappy. Because one and only one personality can be supreme and as every religion claim to have such supreme personality, every religion is taking of the same personality.
Anyone who surrenders to any form of God goes to divine abode of God. Doesn’t matter which religion you are form or which form you worship. There was a Muslim saint RasKhan who worshiped Krishna and went to his abode! Krishna accepted him with love! What God looks for is love and not caste, creed or religion!
The point is anyone from any faith can worship any form of God from the same faith or from the different faith! No one should have any objection to it.