The true meaning of the lucifer

The true meaning of the lucifer.
In anciend greek and roman mythologies; lucifer or eosforos in greek was the god which was represented by the star of venus.
so the eosforos or lucifer was the bringer of the light.
the first light in the morning.
so why the lucifer is associated with the satan of the hebrew and christian religions?
because the christians needed a boogie man to make the people scared.
In tha anciend religions they was no good or evil.
so the dualistic religion of christianity needed to make look the ancient religion to look bad.
thats the christians associated their satan with Lucifer. because they needed to associate the old religion with the evil.