Each and every thing in this world is open this open to criticism, when a scientist who dedicated his entire life to a theory is open to criticism , to scrutiny then why not religion.Should we abide by those parts we suspect as oppressive,or to scrutiny those parts which historical and scientific eveidence proves as false.And why is holy cow status gives to religion,why can my belief be that their belief is wrong and why can't i using scientific and other means given to me critisise those beliefs.What you see as an insult might be often a contradiction suppressed by those "holier than thou" mentality people who hold on archaic notions and expect the whole world to turn a blind eye towards them,