How mature of you.
I admit that Nazis is harsh.
Think about it like that: Having more software released under the GPL (or any other free license) benefits users of niche computer systems - in other words: it's a good thing, especially for us. If we want more people to release their intellectual property under a free license, we need to make sure they feel like they can trust said license.
GPL sucks because it claims freedom while not giving true freedom. Some people may not want to make their software open source, even when it's based on open source software. GPL is restrictive.
If more people behave like Cosmos, less people will release stuff under a free license.
Well, yes. While GPL sucks, you should still comply with it.