"You are correct, atheism is largely devoted to attacking and mocking Christianity."
No it's not. Atheists in the West may be, but atheism itself isn't devoted to anything, since atheism is a state of disbelief in gods.
"Atheists don't seem to spend much time mocking Judaism. I wonder why?"
Because Jews don't try to force ancient creation myths into public schools. Jews don't revise history and make shit up to get their religion good PR. Jews do not say that gays should be placed in concentration camps. In other words, most Jews are not pushy, intolerant, loud-mouthed douchebags. Christians, on the other hand...
"...because Christians are the only religious group on the planet that is freely attacked, defamed, insulted, degraded, and mocked without any objection being raised, and without any negative consequences."
You are an idiot. Christians have been caterwauling about atheists and non-christians for decades. Every time they don't get to violate somebody's 1st Amendment rights, they raise a shit-storm talking about how they're being persecuted and stuff. Also, in the past, criticizing your cult could result in torture or death.
"What atheists (and others, such as Jews) say about Christianity wouldn't be permitted to be said about any other religion."
So when atheists like Pat Condell talk shit about Islam on YouTube and call it a racist, sexist cult of violence and bloodshed, what happens? Does the F.B.I. tap their phones? I don't think so.
"Christianity is being deliberately targeted and attacked by the mass media in the United States, and this attack has been going on for decades."
Uh huh. That's why our last president made his faith public and nearly all of our senators and congressman are religious. Sure.
"Atheism is just one weapon of this attack. The ultimate goal of those who control the media ... the destruction of Christianity."
*yawn* Pull the other one. You're boring me.