I have Evangelical friends in USA. I felt their shock when I told them I have become Lutheran.
What I know horrified them was the thought I have become antinomian. These friends of mine seeing Lutherans in their midst and how they behave, believe that Lutherans are antinomians.
To them, they are "anything goes" Christians. Well of course, anything will go. For if you have been taught that God has ALREADY forgiven you before you were born, before you even believe and before even the Sacraments got applied to you, why won't anything go? Why won't anything go if you are forgiven even before you could repent and even believe? What sin is there that would make you uneasy when that sin has already been forgiven even before you commit it? Nothing.
UOJ does not produce trust, or Biblical faith. Rather it produces assent similar to what the Devil has, an agreement. Notice how UOJers malign faith. Sometimes, I sense their real hatred for the concept.
Since UOJ does not produce faith and since it is to them believing already what is there, it does not bring a change in the one who has "faith". So by Biblical teaching, the faith they speak of does not justify and since there is no justification and there is no consequent sanctification. Hence antinomianism.
If there are American Lutherans who are bothered by the antinomianism in their camp, they should look at the tree, and examine its fruit.
Let me categorically say that lest you think antinomianism is my MAJOR objection to UOJ, then you are absolutely wrong about me. My MAJOR objection to UOJ is simple - it is CONTRARY to the Scripture and the Confessions. Antinomianism is just one of the fruits of a MAJOR error. For as can be expected false doctrine leads to false behavior.