Well, I have to give my two cents about this movie! :]
I am a Christian, and this movie quickly became one of my personal favorites. I loved how they portrayed Christianity and I was satisfied with it. I was born and raised a Christian, and like I said I currently am, so this movie hit home quickly. However, many people say that the way atheists are portrayed in this movie is far from reality, and I want to say my opinion based on personal experiences and from other people's experiences as well.
I recognize there are Christians and Christians that only give themselves that name and do not act like the Bible instructs us to do and do not follow Jesus's teachings. There are Christians who do, and like myself, prefer to preach through their life testimony. As well, there are very nice and awesome atheists [like my uncle] who respect Christians completely and simply could not care less about Christians and their lifestyles, but do not want to embrace it themselves. [High five to those who act like this!]
However, there are nasty atheists that like to lurk around the Internet, waiting for someone to shout "GOD!" to simply come down to them and drown them with atheist logic. Christians do this as well with atheists, shoving God down their throats. So it's pretty even in both sides.
However, there are atheists in universities, schools and the like, and I once had an atheist teacher that gave me an F in an exam, two D's and gave me a C in class because I was a Christian. The minute she saw me with a Christian shirt [ihadnoideashewasanatheist-w-] she began to say awful things about God and to treat me harshly. When I contacted her, she had left to Germany, so I left everything as it was. I forgave her, however.
The thing is, the film may have exaggerated by generalizing that "all" atheists are like this, but I think that the film only focused on a certain type of atheism that we cannot deny that it exists. Just surf for a while on the internet, especially on Youtube, and you'll see many atheists like this, that attack us Christians without mercy. The same way around, though, and I'm making it clear just in case.
All in all, I think the movie is much more oriented towards the Christian community. I hate it when people call this movie "propaganda." It isn't, in my point of view. [To each their own.] It is a film that wants to preach about God, which is what Christians are expected to do by Jesus's teachings and what we true Christians do out of love for God's word and what He has done for us. We're just so thankful and happy that we have to talk about it. The movie is just an amplified version of that feeling, and it spoke to many, and many hated it. The fact that many people hated the movie could have been easily solved by not watching it in the first place. [When I'm not okay with a movie topic, I simply do not watch it. Just because it's on theaters does not mean I will go and watch it.] If you knew that it was about God and Christians vs. atheists [which I strongly dislike how it sounds like, but it's true] then you can imagine what the movie is going to be like. And also, why does the movie God is Not Dead get such a bad rep, but movies that explicitly show sex, rape scenes [i'm looking at you, The November Man], drugs, violence, assassination, murder, kidnapping, torture and other things get the highest ratings? Ah, I dunno, maybe humans are naturally evil-inclined. They repulse against everything good or harmless, but feed off negativity. Many people will say, "But religion is bad!!!!! PEOPLE KILL BECAUSE OF RELIGION!!!!!!!" Yeah, it is! Even Jesus came to earth and fought against it. But, dunno. That's just me.