Sir, the confusion resides in your position. For a itinerant Jew who no doubt wore his phylacteries with great care, Thomas would be very mindful of the "Big 10" and not use God's Name in vain.
to see something beautiful of God’s creation ..and say “my God”...is certainly not in vain. You are so lost in your mind that you cannot see the reality and commonsense of Jesus and the very simplicity of his being. In all of your learning, you guys have lost the real salvation that he came to give you... and only have left an idea of salvation..it is an illusion and you will not see it.