Yiddish: He's making an elephant out of a fly.

He's over-reacting, treating a trivial issue as if it were a major problem.  (He's making a mountain out of a molehill.)    SOURCE: Stutchkoff, Der Oytser fun der Yidisher Shprakh.  Compare:

Er makht fun a vort a kvort. | .ער מאַכט פֿון אַ וואָרט אַ קוואָרט
He's making a quart out of a word (a mountain out of a molehill).

SOURCE: Bernstein, Jüdische Sprichwörter und Redensarten

ער מאַכט פֿון אַ פֿליג אַ העלפֿאַנד.

Er makht fun a flig a helfand.

He's making an elephant out of a fly.