I think it was more racist before the internet--probably much more--because the internet's facilitation of meme and viral idea exchange meant that a lot of smart and inspiring ideas about racism, homophobia, etc. spread like wildfire among the younger generations who lived for the internet, which I believe is what led to the widespread acceptance of homosexuals and other LGBTQ people. So it probably helped racism too.

Regarding the Instagram account, the internet is a big place, and there will be something for/by everybody, including the minority of people who are still racist. So, if anything, the internet just made it easier to see things like racism, at least/especially those things that pertain to a minority of people.