In my own study of these things, I would track down the sources of paganism and the beliefs and traditions of other religions and cultures. Weighing the findings against our own modern day practices. Doing this has been the foundation of my current perspective on these matters, which is this:
There are only two real "gods" in this world, one being the devil (which most people serve) and our Father. The devil, the fallen angels and his henchmen (the various priesthoods, enlightened, and secret societies) have been at work on this earth since the beginning and are responsible for the creation of religion (although their influence is in no way limited to religion) from Babylon and onward. From our Biblical perspective, we believe that all people at one time spoke the same language. Then when God confused all of our languages, the same elements and beliefs existed but they took on many different names.
Now when I study these things I do not focus so much on the specifics(because our knowledge of the specifics can be limited), but instead just look for the recurring themes and concepts which run through everything.
In the case of Easter, you have a number of elements.
The feminine goddesses of "love", fertility, spring, agriculture, motherhood and earth:
Astarte, Ishtar, Asherah, Ashtoreth, Dagan, Venus/Aphrodite, Prende, Astghik, Xochiquetzal, Xochipilli, Qetesh, Aine, Ziva, Parvati, Milda, Ala, Asase, Mbaba, Allat, Al-Uzza, Anahit, Tonacacihuatl, Coatlicue, Chimalma, Laima, Saule, Sowathara, Brigid, Cernunnos, Damara, Damona, Epona, Nantosuelta, Onuava, Rosmerta, Theotokos(Mary Mother of God), the catholic "Saints" (Saint Anne, Saint Rita of Cascia etc) a Heget, Isis, Renenutet, Tefnut, Sobek, Thesan, Turan, Rauni, Nerthus, Freyja, Artemis, Demeter, Gaia, Hera, Rhea, Haumea, Kamapua'a, Lajja Gauri, Manasa, Banka-Mundi, Bhumi, Nikkal, Shaushka, Mama Ocllo, Sara Mama, Pachamama, Anjea, Kamilaroi, Dilga, Kunapipi, Julunggul, Akna, Pukkeenegak, Inari Okami, Kichijoten, Nanshe, Ningal, Sharra Itu, Hanhepi Wi, Lakota, Gefjun, Gedi, Anahita, Bona Dea, Diana, Fecunditas, Feronia, Flora, Ops, Libera, Terra, Beiwe, Rana Nietja, Kostroma, Zeme, Ziva, Ajysyt, Umay, Ayida-weddo, Ioa, Nikkal etc...
The phallic architecture, worship and symbolism:
Asherah poles, Ashtoreth poles, maypoles, obelisks (Egypt, Washington Monument, Saint Peter's Square [Vatican], Greece, Luxor in Paris, Cleopatra's Needle in New York, Buenos Aires Argentina, Lateran[and 12 others] in Rome, Axum in Ethiopa etc), lingga (hinduism), and on and on and on.. Many many examples of this category from all over the world and throughout history.
Eggs, bunnies, sacred cakes, the hunt etc... I'd get more into it but have family plans today.
How I feel about these things is that if they are not in the Bible, they all come from the same place.
As followers of Christ, it is up to us to celebrate what we choose on an individual, family and community level, preferably the things of God
. We can determine the meaning of our own celebrations, but let us be careful to keep them from being polluted by the world.
We should not be naive and go along with the masses who by default serve the devil whether they know it or not.
We can not change the world by imposing ourselves on it, but by loving as God told us to love and spreading the knowledge of the truth.
Their is so much pagan influence in the "church", governments, media and their traditions and practices that it can almost be overwhelming once you first start to become aware of it all.
Just remember there is nothing at all to fear for those in Christ
, do not allow worry to take hold in you and negatively effect the love of God becoming perfected within us.