I can't speak to German usage or German antifascists. Obviously that is an enormous topic.
I can speak to North American usage. In North America, as I've stated, the word is being used to confuse and distract. This is why I feel the word has taken on negative connotations, in English, in North America.
As stated above, if a fascist can use the word to to tell millions of Americans the word means anti-family...see what I'm saying?