I think a lot of people (including myself) are tired of atheists speaking up when it clearly isn't necessary -- forcing your non-belief down people's throats isn't any better than forcing your belief on them.
As for Jesus, well.
The main issue that I really don't believe in Christianity and the stuff in the NT is that clearly none of it can be "God's word" as much as the Tanakh and the Qur'an are simply because half the bloody thing is written in broken Greek where the Tanakh is definitely one of the most brilliant pieces of writing known to mankind, just linguistically, and I've heard the same of the Qur'an, but haven't read any of it in the original so I'm definitely not able to make a fair judgment on how well written it is. But yeah, why would the same God have some shoddily written scripture that even breaks with some of the previous messages?
Also, what's up with Christians saying Jesus is God's son, as opposed to other prophets not having that role? Note that I found out today that Mormon scripture says Moses was also the son of God. Heh.
I seem to recall something I heard in Deen that there's a passage in the Tanakh where God refers to Moses as "my son". Can't find it now, though.
I just doubt how far you can consider Jesus above the rest of humanity, and Christians seem to do it to the point where they created the mess that is the Trinity (three seemingly random aspects of their deity chosen to a) make said deity more tangible and b) make the whole bloody thing a polytheistic religion because clearly you cannot have 3 = 1 and 3 - 1 = 1, and all that is completely ... I just wanted to say haram, but what I mean is going against what is clearly written in the Tanakh.
Mohammed's life has been fairly well documented, I mean he was an important politician, he had a life to begin with, and even stuff like his night journey (where he is said to have travelled from Medina to Jerusalem and back in one night) can be accounted for semi-logically without even needing any miracles.
Of course his life outside of being a prophet is part of what makes Islam so difficult now; his 'calling' was to govern the people and improve society, as a politician and lawmaker amongst other things. He made laws people still live by. These laws were revolutionary and really liberal at the time (for example, the amount of rights women are afforded in Islam were staggering if you see it in a context of surrounding societies at the time), but are now terribly outdated and a lot of educated reasonable Muslims realise that. A lot also don't which is why some countries have crazy Shari'ah.
Anyway...
Eid is like Islamic Christmas. You celebrate it when you're finished fasting. \o/