If you actually read your own link, you'd see that the author has a hard time actually pinning down anything important that the Facebook post he tries to critique was fundamentally wrong about. He is honest enough to admit that the main point, that Easter(among many other Xstian festivals) has roots in earlier pagan celebrations, is unquestionably true. He just makes a lot of minor quibbles about the etymology of the word and exactly what goddess was most closely associated with it, and if you read the comments, even those quibbles are by no means indisputable.
And how would you evaluate your source saying the following:
be polite and respectful when you enter into a debate, even when the person youre debating with loses their cool. You want to prove that youre better, more enlightened than Christians? Great, do it by remaining rational and level-headed in the face of someone whos willing to stoop to personal attacks. To behave otherwise is to be just as bad as the people youre debating.
given his personal attacks on Dawkins, whom he dishonestly refers to as a "noted misogynist and eugenics enthusiast"? I'd call him a raving hypocrite. How about you?