That ain't really a direct issue with Christianity though their synchrotism game is fucken solid. Every culture does this either with their ancestor culture or with interacted cultures usually both. The stupidity isn't saying that certain symbols are associated with X, Y, or Z but with having the buck stop with said association. The triple symbolism goes back to the Neolithic in Europe and given how common wood tools seem to have been id hazard a guess there may have been even older examples somewhere that were simply lost due to being made of more perishable materials.