Subject: Re: Jesus Christ Arrested by DOJ
Could not a case be made for this being an example of the government favoring one religious expression over another?

I think you would more likely see that as a straight up Free Exercise claim. That government was interfering with people's ability to engage in worship, and thereby infringing on their right to the Free Exercise of religion. Allegations that government favors one religion over another are more often seen in Establishment Clause cases. A good lawyer might bring both, but I think the Free Exercise claim is a better fit.