""Why Muslim world or Muslims did not insult Jesus or mother of Jesus instead of that they are giving more respect to them then Christian.
Why was that? ""

Beacuse,... we are not considered a real Muslim if we dont believe and respect Jesus Christ, but....as a prophet and NOT a god or son of God. And the mother of Jesus(Maryam/Virgin Mary) is one of our role model for woman in Islam for her purity and cleanliness.