The articles say they were singing it "loudly" but it is apparent that the main singer has his mouth very close to the microphone, and is not singing loudly at all. Certainly the guards do not seem fazed.
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Buy EoZ's books!
PROTOCOLS: EXPOSING MODERN ANTISEMITISM
If you want real peace, don't insist on a divided Jerusalem, @USAmbIsrael
The Apartheid charge, the Abraham Accords and the "right side of history"
With Palestinians, there is no need to exaggerate: they really support murdering random Jews
Great news for Yom HaShoah! There are no antisemites!