In the U.S.A. the government is now permitting Muslim military personnel to keep beards and adopt Muslim dress style as long as this does not interfer

Answer

It is not possible to practise the Deen whilst aiding and abetting those who oppress and murder countless thousands of Muslims all over the world. Those who profess to be Muslims but serve in the militaries and security apparatus of the zaalimeen enemies of Islam and the Ummah, are hovering on the brink of kufr. The concessions made impress stupid, bootlicking entities such as the council for American-Islamic Relations. These modernist bootlickers have no proper idea of Islam. It is haraam for Muslims to participate in the armies of the kuffaar, and of even the secular so-called Muslim states where the governments are all kuffaar masquerading as Muslims.