An important thing to realize is that similarity does not establish dependence. You have to show that one tradition is in fact dependant on another. Otherwise, you fall prey to same kind of reasoning that leads people to believe aliens taught us how to build the pyramids because so many independent cultures built them.

One also needs to be critical of sources. Where do we get the information regarding Odin? Often, when supposed pagan Origins to Christimas traditions are stated, they are given without any source. Be sure to locate the sources these traditions supposedly come from. When were they recorded?

As for the Odin claim specifically, I will point you to Jackson Crawford. He is an excellent scholar with a PhD in Old Norse. He is certainly better qualified than I to dig into the specifics: https://m.youtube.com/watch?v=_o5ih9WuCxQ

As for Easter, Michael Jones at InspiringPhilosophy put together a good video on the topic: https://youtu.be/IffNsK_fdoY