Do you know how many companies have lost billions of dollars/brand credibility/franchises by thinking ' I don't think the amount of people', so I'm going to do this anyway.
A breif general example Starbucks: 'australians are the same as americans, we don't need to think about this or that. just set up our franchises there and they will sell' You know what happened to Starbucks in australia because they disregarded seemingly insignificant things? The company crashed and burned in the australian market to embarrassing levels...costing them billion/trillions of dollars.
You're almost certainly right that someone will always be offended, but the particular group who might be most offended to allusions to Jesus already has Andraste and the Chatry to be upset about, not to mention Homosexual content within the game. Fundamentalists in the media have already tried to chew Bioware out for those content issues as early as ME1.
To me, a little feet washing seems to pale in comparison.
Also, if they did take issue with the representation of a catholicism expy in Dragon Age, I feel like someone might be able to wave Dante's Inferno in their faces to distract them.