Regressives don't (or can't) distinguish between depiction and endorsement. It's why the film Joker was so controversial with them even though he's supposed to be a fucking villain, why they get so upset over swastikas and even the Iron Cross in video games, and why they're so focused on "representation" in media.

Obviously, I'm not comparing the statue to these things. But you can bet the statue was removed because they didn't want to be seen as endorsing Christianity by virtue of depicting a real place the way it actually is.