Why is it that atheists and theists can't seem to get along?

We atheists need to hide our atheism from the loving Christians who hate us.
We have a political need get along. Religion is too inane for us to consider.

I think offline, most of us do. But on the internet, we don't start out as someone's coworker, neighbor, friend, or anything like that. Here, the first thing most people see of you is an opinion.

Theists like to try and make atheists theists.

Nonsense. I get along just fine with my atheist friends. We agree to disagree and just enjoy each other's company.

I get on fine with many people and have no idea what the religious beliefs of most of them are. Religion is a personal matter and what anyone believe or doesn't believe is nobody's business but theirs. Provided they don't try to impose their religion on me, and most people are far too civilised to try that, then we will get on well.

Atheists don't appreciate liars.

Simple as that.

“Theists, especially Christians, try to control and restrict us based on their views.
If all Christians stop crusading against science, education, culture, art, sex and sexuality, religious freedom and such, stop dishonestly misrepresenting your beliefs as facts, and stop telling everybody else they're going to be tortured throughout eternity unless they join you, I assure you that you won't encounter nearly as much hostility.”

‘Religious apologists complain bitterly that atheists and secularists are aggressive and hostile in their criticism of them. I always say: look, when you guys were in charge, you didn’t argue with us, you just burnt us at the stake. Now what we’re doing is, we’re presenting you with some arguments and some challenging questions, and you complain.’ A.C. Grayling

“I'll tell you what you did with Atheists for about 1500 years. You outlawed them from the universities or any teaching careers, besmirched their reputations, banned or burned their books or their writings of any kind, drove them into exile, humiliated them, seized their properties, arrested them for blasphemy. You dehumanised them with beatings and exquisite torture, gouged out their eyes, slit their tongues, stretched, crushed, or broke their limbs, tore off their breasts if they were women, crushed their scrotums if they were men, imprisoned them, stabbed them, disembowelled them, hanged them, burnt them alive.

And you have nerve enough to complain to me that I laugh at you.” ― Madalyn Murray O'Hair

“If the world hates you, keep in mind that it hated me first. If you belonged to the world, it would love you as its own. As it is, you do not belong to the world, but I have chosen you out of the world. That is why the world hates you. Remember what I told you: ‘A servant is not greater than his master.’ If they persecuted me, they will persecute you also. If they obeyed my teaching, they will obey yours also. They will treat you this way because of my name, for they do not know the one who sent me. If I had not come and spoken to them, they would not be guilty of sin; but now they have no excuse for their sin. Whoever hates me hates my Father as well. If I had not done among them the works no one else did, they would not be guilty of sin. As it is, they have seen, and yet they have hated both me and my Father. But this is to fulfill what is written in their Law: ‘They hated me without reason.’
John 15:18‭-‬25

Atheist for the most part do not care what gods you chose to worship nor how you chose to worship them and all we desire is that you understand that not everyone requires much less desires that which they seem to.

Theists seem to think they are superior for having some mythical god on their side. No gods exist.

the problem is not anything to do with atheists, God, Jesus, the bible, or even Christianity and all to do with the intolerance, hatred, bigotry, homophobia and persecution posted by BAD Christians towards others!

ALL the other religions and atheists live in peace and are ONLY attacked by BAD Christians which causes all GOOD Christians to despair at the damage they do!

The self-destruction of Christianity is underway and the only thing that can stop it is to abandon the terrible human emotions, seek to rediscover the idea of a loving god and act like it!

BAD Christians not only drive people further away from God but are the reason so many DECENT people are becoming ANTI THEISTS!

Pew News reports Christianity is shrinking with a corresponding rise in atheism!

Five times as many Americans in 2014 said they never prayed compared to those asked the same question in the 1980s

A person can know with certainty there is a God by way of having true devotion to the Virgin Mary.

My late mother was a committed Christian. My closest friend of 23 years standing is a staunch Roman Catholic. My wife's best friend's husband, a great guy by any standards, is also a Roman Catholic.

I also had Hindu friends at university, had a Jewish bridge partner, one of my friends married a wonderful lady (who died sadly of breast cancer), whose mother was an Auschwitz survivor ....

I have been an atheist and secular humanist for 53 years, and everybody knows where I stand.

So yes it is possible.

The fact that all the above are/were essentially liberal may be a factor.

Many of the alleged Christians on this site (not all!) seem to be far more extreme in their views, and don't seem capable or willing to examine their opinions, and rather expect non-believers to conform totally to their explanations (no matter how absurd) without any further discussion. It is also interesting how many of them don't seem to know the teachings of Christ ....

The Bible very clearly gives the answer to this question. What does light have to do with Darkness? You cannot eat at the table with demons and still serve God? what Fellowship does the righteous have with the Wicked Man?

There are other options.