Yiddish films
... that due to violent disruptions by Hebrew-only proponents, Yiddish films screened in Mandatory Palestine had to be dubbed?
... that due to violent disruptions by <a class="mw-redirect" href="./Battalion_for_the_Defence_of_the_Language" id="mwAzs" rel="mw:WikiLink" title="Battalion for the Defence of the Language">Hebrew-only proponents</a>, <b id="mwAzw"><a href="./Yiddish_cinema" id="mwAz0" rel="mw:WikiLink" title="Yiddish cinema">Yiddish films</a></b> screened in <a href="./Mandatory_Palestine" id="mwAz4" rel="mw:WikiLink" title="Mandatory Palestine">Mandatory Palestine</a> had to be dubbed?