So, a source is only valid if it's not from a Christian? That's a bizarre stipulation. I suppose arguments against the existence of God are suspect if they don't come from theists, too?Dude posting a Christian site as a citing for a Christian belief is beyond propaganda and falls into the "fringes of American Evangelicalism" in terms of the share lunacy of notion. Please come back when you have a non-Christian site that supports your arguement, you could perhaps also look up Easter in terms of Pagan festivals, and the invention of the Devil as a control device derived from previous religions.
The source is either valid or not, regardless of the source or its intent, and in this case your response is particularly dubious because the overwhelming majority of sources making the pagan claim to begin with aren't coming from Christians, either. This sword would cut both ways if it cut either way (which it doesn't).
I'd also point out that, if you're not a Christian, your response would be inherently self-contradicting, because you, just like the author of the article I posted, would be making a claim that you also happened to agree with.
Please, let's stick to refuting facts. There's no place in serious conversation for ad hominem claims, particularly ones as broad as "this is from a Christian, so it doesn't count."