1. Jews on Tumblr are NOT just politely saying "Hey, recognize that some atheists are still culturally Christian and this still harms us."
In every single experience I've ever had on this site, Jews have been neither calm nor polite on any posts regarding the use of the term "culturally Christian". In every interaction where Jews talked about cultural Christianity, they brought up the term to dismiss any criticism of the Torah or question about Judaism that they don't approve of by claiming that the person's opinions and questions are invalid because the person is "culturally Christian".
2. The problem people have with the Jewish use of the term "culturally Christian" isn't that we're denying that some atheists are culturally Christian and that Christianity has a long history of antisemitism.
The problem is that y'all are, as mentioned in the first point, using it as a condescending dismissal of anything any atheist has to say (or ask) about the religion of Judaism that you even remotely don't approve of.
And people get irritated and disrespectful toward people who are treating them condescendingly.
Frankly, based on your post's hyperbolic and intentionally uncharitable depiction of atheists and past interactions where people accused me of being antisemitic for things like
it's hard to take your claim seriously even though I know that, like with any large group of people, atheists that are antisemitic exist.
3. Even if there are Jews using the term in the way you claim they are (which, statistically speaking, it's not only possible but likely that some are), the problem isn't that they're saying that some atheists are culturally Christian.
It's that the fact that some atheists are culturally Christian doesn't actually impact Jewish people in a significant way at all.
For starters, we're a minority in most countries. And we're not in power. There are 7 states in the US where we're not even legally allowed to run for office. In Canada, it's legal to fire someone from a government position if they're found to be atheist. Several countries in the world have the death penalty for atheism. Egypt declared atheists to be terrorists.
"Atheists are our oppressors" and "atheists are prone to siding with our oppressors" has no tangible basis in reality.
4. Y'all repeatedly say that Indigenous people have to be "culturally Christian" because they live in a Christian-majority country.
I would think that I wouldn't have to explain why that's an utterly disgusting thing to say to Indigenous people, but apparently I do or I wouldn't have Jewish people telling me that I have to be culturally Christian because they said so.
Indigenous people have been facing genocide (both cultural and physical) by Christians for over 500 years.
In Canada, kids were kidnapped from their parents by the government and forced to assimilate to Christianity. They were given numbers as names and forbidden from speaking their language. Kids were publically flogged if they tried to escape. Indian Residential Schools didn't close down in Canada until 1997.
In Brazil, Indigenous people were hunted by Christians and Christians wore the severed ears of Indigenous people as a way of showing off how many people they killed. Right now, the government is trying to pass a bill to cut down Indigenous rights to their lands.
Saying that Indigenous people have to be culturally Christian because some rando Jewish people said so is disgusting and racist af.
It's also wildly ironic that you're imposing Christianity on Indigenous people -- which is a very Christian thing to do.
5. Y'all use double-standards when talking about yourself vs other people.
When I ask if Jews who live in Christian-majority countries are culturally Christian by virtue of where they live I get called a moron, antisemitic, and get told to go kill myself.
So the same standard of "you are culturally part of the majority religion of where you live" isn't held when it comes to Jews.
6. You don't have the right to impose a culture on someone any more than you have the right to impose a gender on someone.
It's not up to you to decide what someone believes.