the long long time that you speak of several times in these comments is a long long time in which many people suffer poorer education, the results of discrimination, the laws set up to favour the religious over the non-religious as well as it slows down scientific development and research because typically believers are not big fans of science and when they get power they tend to underfund it. etc etc.

So by all means, choose not to be involved. But realise that if you did get involved, you could potentially save many people from suffering. Every person you interacted with, could spread your ideas far further than the number of interactions you have. You could make a big difference in peoples lives by being willing to at least somewhat be an "activist" in the sense of spreading ideas and questioning bad ones.

Nobody says you have to be an "asshole" atheist about it. If that is what worries you then know there are plenty of reasonable effective ways to spread knowledge without having fights and insulting people.

Spreading scientific literacy is a great way to go about things more subtly. Inspiring curiosity in the young. Encouraging critical thinking. Showing people that you can be ethical without religion as an example.

SO many ways, so much positivity to spread.

That said, ultimately it's your choice. there are many good things to put your efforts towards, and it isn't possible to do all of them so everyone has a right to pick and choose their causes.

Another very very important cause, that is tied up with religious and right wing politics bogging it down around the world... is climate change.

The level of suffering we are on a trajectory for at present is far greater even than religion causes.

Also incidentally, Nat Geo got bought up by Fox (yes as in the same company and billionaire behind fox news) and it has started publishing some complete drivel since late 2015. I wouldn't trust it as a source generally any more. You also mentioned how your source was newer, well here is an even newer source (Last Month) from a more repubtable organisation (pew research and polling) http://www.pewresearch.org/fact-tank/2017/04/07/why-people-with-no-religion-are-projected-to-decline-as-a-share-of-the-worlds-population/

it confirms that although the number of Unaffiliated to any religion is increasing in absolute numbers, because of the explosive population growth in more religious countries, and given the rates of people staying in their "birth" faiths (especially Islam - way less people leave it) as a percentage of those exploding populations in those countries, if current trends continue, atheists and agnostics shrink as a global share over the next few decades.