I’m pretty sure that most people are mature enough to differentiate between an organization that makes software and nothing at all to do with kids and/or sexuality and that old wierdo’s personal views.

That's not how PR works.

We live in a world where huge corporations with a revenue higher than the GDP of many countries routinely exploit child labour and work their workers to death or suicide, burning whole countries and pushing climate change while at it. And yet we collectively shrug and still buy Nestle, Apple, Samsung or H&M.

This is just whataboutism.

A shitstorm towards such a niche and unknown organisation as the FSF really doesn’t matter. We all know the Stallman and the FSF, because we are into computers, software and/or open source. But ask any random person on the street, thew wouldn’t know who Stallman or the FSF is if you told them that it’s not Android but actually Chrome/Android SDK/Dalvik/Toybox/Linux that runs on their phone.

So just because the FSF is a niche org, we should just ignore the problematic public statements by it's founder and the person who's always been at the forefront of their PR?

Tbh, this just sounds like free speech absolutism apologia. Yes, people can say whatever they want. But they are not free from consequences. I want nothing to do with an org that would have Stallman as a part of it. I don't want to be associated with anyone who would. If you continue supporting an org that supports someone like Stallman, then both you and the org approve of the things he's saying. Period. Your words mean nothing. Your actions speak for themselves.