Let’s not forget there use of the Islamic moon in there symbols.
Of course! As well as symbols from every pagan religion known. It's all to make them feel welcome in the one world religion. Cardinal Newman admitted such.
"We are told in various ways by Eusebius that Constantine in order to recommend the new religion to the heathen transferred into it the outward ornaments to which they had been accustomed in their own. [Cardinal Newman, Development of the Christian Doctrine pg 373]