Things that piss me off

I don't particularly enjoy xmas. It's so long and drawn out and noisy and "OMG, everyone must be happy because this is the happiest time of the year!" all for a celebration of the birth of the messiah of a religion that I don't believe in.

What pisses me off is people telling me that I should celebrate and enjoy (as though you can just enjoy something because someone tells you to) xmas because it isn't really a xian holiday, it actually has Pagan roots.

But I'm not Pagan either! The fact that it has Pagan roots is completely irrelevant! So a holiday in one religion I don't believe in actually has roots in another religion I don't believe in? If they discovered that Ramadan had Buddhist roots, would everyone suddenly start fasting during Ramadan?

It also seems to me that this line of reasoning might be a bit disrespectful to Pagans, although I can't quite articulate why.

***

Not a thing that pisses me off, just an observation resulting from a long and winding train of thought that came to me before I hit Publish Post:

I make no secret of the fact that I have a negative view of my former religion. I figure as someone who was once on the inside, I'm entitled. I've been there, I've lived it, I've given it really quite a lot of thought including a full-fledged crisis of faith, and I've come to the conclusion that it's a negative thing. Not everyone's going to agree with me, but I don't care; I know whereof I speak.

What I find odd is that people judge me for being anti-xian in exactly the same way they'd judge an outsider who had never been exposed to xianity for being anti-xian. They view my negative assessment of the religion I grew up in, studied, wrestled with, carefully examined, and ultimately decided to leave (entailing some family drama) as being just as intolerant as a negative assessment coming from someone who has never even heard of the contents of John 3:16. To me, that sounds like considering the following to scenarios perfectly equal:

"I'm heard of that Bob fellow, and I HATE HIM!"
"You are so judgemental!"

vs.

"I was married to Bob for 15 years, and he was an abusive husband who made my life miserable. I HATE HIM!"
"You are so judgemental!"

I've been trying to figure out if there's anything comparable other than religion where this can happen, where an insider's negative assessment is considered just as unjustly judgemental as an outsider's. I can't think of anything offhand.