Symbols are not exclusively owned forever by anyone, especially by those who worship idols and false gods.
Symbols often have multiple meanings, for different groups and for different purposes.
Im this respect, "The Two Babylons" is a superb work of fiction, anti-Catholic propaganda, and pure fantasy.
For specifics, go here:
http://www.heraldryclipart.com/heraldry-symbolism.html
http://www.stthomasirondequoit.com/faq/id284.htm
Even a formerly pagan symbol means nothing to those who associate other things with it.
An image of the Blessed Virgin holding her son, Jesus, who is truly God, has nothing to do with false, pagan gods, no matter what some wackos choose to associate it with.
The easter bunny can be a symbol of abundance and new life, and not pagan fertility rites. Plus, bunnies are cute animals. Kids like them. That's not the least bit pagan either.
The easter egg can be a symbol of Christ's tomb, from which he emerged victorious on Easter Sunday, the source of new life for all mankind.
And that's the truth, not some old pagan myth.