Nope. They were changed because the ruling invaders (Romans) changed to Christianity as their state faith, and when you have a mandatory state faith then going against it can be a life limiting experience. Similar to the various changes to the way the Christian faith could be practiced in the 16th century; One year you have to say Mass in Latin & Bible can only be written in Latin, the next year it has to all be in English. One year you were expected to worship the saints, the next you couldn't. One month you had to believe in Transumstantiation, the next it was only a representation. If you didn't do it right, burning at the stake or hanging time for you.
Once the Romans had gone many people went back to the "old ways" - not really much of a change, as the Christians had just taken over the sacred places and traditions and renamed them/built over them, so they would just change the names back.
When the assorted missionaries came to Britain the kings realised that "converting" was a good political move for them. Didn't stop them having a mix of Pagan & Christian grave goods or symbols around.
Have a visit one day to Canterbury, Rochester, Ely, Durham, St Giles or Exeter Cathedrals; they a full of carvings of the Green Man - very much a Pagan symbol. Very popular spiritual figure in many ancient and Pagan beliefs, so the early Christians shoe horned him in somehow.
And please explain why all the symbols of new life and fertility are relevant to the DEATH of Christ. You can sort of see from a RE-birth aspect, but new birth, eggs etc? They just changed the name from Ostara/Oestre to Easter.
People nowadays however aren't saying you'll be punished if you don't change to our way of things, just try to stop pretending that as you stole near enough all your traditions then others can't claim them back.