The original question does bring up an excellent point though. At the core minecraft is not demonic but it's world that we have developed might be. First you have the night creatures that consist of spiders, undead, a shadow traveler, and a suicidal creature. Just the concept of the creeper yells out demon, this creature has nothing in its life except to find and blow up on you. The endermen is just a nervous creature and is easily startled and the undead no matter how you look at it had to be alive at some point. Then you have the nether, a demonic plane of existence that you can travel to. Plus theres also the end suggesting the endermen are not even from your world but this one where they are at peace. Then of course there's the fandom of herobrine that goes even deeper into this dark universe. We also have to remember that this lovable game came from the original concept of a horror survival game that went to being awesome. So I think yes is a reasonable answer.
