Is anyone else bothered by crucifixes in Protestant churches?
Ha. As a Lutheran Christian, I'll posit that they stumbled into a Lutheran church.
Seriously, though, was there anything on-screen to signify the denomination? We're presuming that it wasn't from a pro-crucifix tradition because the design of the church resembled the sort of smallish, country church that'd normally be Baptist or non-denominational or Pentecostal, particularly in the south, right?
Hey, the show's fairly clumsy with everything that doesn't involve the zombies themselves, so the odds are that they just fudged it for dramatic effect. It's a lot less direct to complain to a couple of sticks, would be the world's thinking. It's up to us to take it to the next level and ask whether these appropriations of symbols, placed in this context, has anything of larger theological import to say. For example, nobody ever sets a "yell at/cry to God" scene like this inside one of those modern megachurches with its worship space indistinguishable from a lecture hall or capable of doubling as a basketball court.