You can colour it any way that you like. Many Americans would likely baulk at the idea of a turkey-less Thanksgiving. It is a central theme of the holiday. What else is it, if not a sacrifice?

It's food and fun, not sacrifice.

We can do it for both. Why not?

Perun is a "pseudo" God, as much as Zeus was a pseudo God.

And if they are pseudo gods, then Jesus Christ is a pseudo God, too.

Gods exist as long as people believe in them.

Because we mostly don't like gods, at least here in CZ.