Social media have consistently revealed that people can have strong feelings about concerns they lack understanding in.
Also there is a whole cottage industry (indeed, several of them) which have sprung up around instigating baseless outrage.
It is important to remember this as you confront anything you see on the internet. This awareness can help you regulate your own emotional health.
(There are outrageous things in the world. Not every example of outrage is worth your attention or energy.)