Do you find it important that Spider-Man does not exist? Do you think anyone in their right mind would find it important? No, but the moment someone starts to force you to do or not do stuff because Spider-Man thinks it's bad it becomes important to make it clear that Spider-Man is not real.
The VAST majority of atheist are indifferent towards religion, unless that religion is trying to control them somehow. This is why you don't see atheist complaining about Buddhism in western countries, if a religion is not trying to force itself into an atheist life he cares as much as you do about all of the thousands of other religions you're an atheist towards. If you feel atheist are trying to impose their non-believe on you, it's because you're trying to impose your belief on them and they're calling you on your bullshit.
Also, btw, I never claimed I was an atheist, so I see no reason for you to think that atheist should believe the same thing I do.
At the end of the day data is just binary, i.e. it's composed of 0 and 1. What those 0 and 1 represent is mostly irrelevant to this discussion. The short version is that
01000001
can meanA
or it can mean that a given pixel is65/256
red, or that the speaker should vibrate in a specific frequency, etc, etc.So what happens when you open a file that's not text in a text editor? Well, some of the 0 and 1 make up gibberish, or characters that are not meant to be printed. Fun fact, you should be able do this the other way around too, i.e. open a text as an image, but again it will be gibberish, and most likely would not load since images have lots of information that relate to size, compression, etc, that if incorrect the program won't know what to do, but because text can always be valid it will always work, although sometimes your editor might show weird thing in the places where there's a non-printable character.