Take a look at that post first. The rest of this won't make any sense unless you do.

What on earth does that have to do with Linux? Maybe Madthums is anti-Android because the Android kernel is a fork of Linux? It's not entirely clear from his post history what his opinion is on Android. But just for one quote, he did say:

An Android is technically using the Linux kernel, but no one out of his or her mind would call an Android a Linux.

He's made his disdain for F-Droid clear many times in the past, but I'm not quire sure how Madthumbs' original post is really relevant to F-Droid either. F-Droid's official repository doesn't include FUTO Keyboard (because FUTO Keyboard's license is not FOSS and F-Droid only carries FOSS in its official repository.)

FUTO Keyboard can be installed via F-Droid but only because FUTO provides an F-Droid repository that must be manually added to F-Droid. Blaming F-Droid for FUTO Keyboard's failings is like blaming your ISP because you don't like the pizza topping preferences expressed in a post you found on Facebook.

Mind you, FUTO's fucking evil and deserves a huge amount of condemnation. But I honestly think Madthumbs must be confused about something to be making that particular post in his anti-Linux community.