Julius doesn't follow any recognized noble religion. And because we as Republic believe in freedom of religion* we prohibited priests from SA to preach in Barca.
* = That is a free as it gets in medieval Europe. As noble you have the right to follow any faith you want, as peasants you just follow the faith of your Lord or whatever is being preached.
I would say that Barca is a oligarchic republic. The Barcan Senate rules the realm. We are nothing like a tyranny.