The toxicity of the community sprouts from the community itself. The playerbase, how they handle the game, age, and of course all the typical influences that come with life in general.

One community may bother another one. A community who thinks something the general public considers extremely offensive is okay normally will clash with any community that gets offended. Maturity of the community goes a long way, and of course staff don't excluded from this, they are players after all. Toxicity may come from one bad experience caused by one person to one other person, or a whole group of people who are just overall unhappy.

I think it typically, like all things in life, starts with something small and becomes bigger. As the playerbase grew, and as time passed, things had to change; it's reality. Many people, however, are resistant to trial and error and change in itself. You can't expect anything to get better without either though. Mainly I just think it's just the people themselves. How they're raised, their beliefs, and how they feel once they step onto that online world.