Your point about Yiddush over Hebrew has been made before. But Yiddish is a language of exile and specific to only some Jews. Using Yiddish as the 'national' language woould look and sound like Afrikaans. It would have excluded every Mizrachi. More than Judaism even, Hebrew is the one thing Jews from all strands have in common.
Exit polls predict Portugal's center-right coalition set to win election (Reuters)
from the article: 'If a million American Jews moved to Israel, there'd be peace'