Why was Germany allowed to rearm after World War 2?

Germany was allowed to rearm after World War 2 due to several reasons: 1. The rise of the USSR as a nuclear power and the threat of a war in Europe. 2. The US wanted Europe to share in defense responsibilities. 3. West Germany wanted to assert its independence and leadership in Europe. 4. The British agreed to German remilitarization as it meant less financial burden on them. 5. The French were convinced that a strong Germany integrated into NATO would not act alone and that blocking rearmament would jeopardize France's leadership in Europe.

via Why was Germany allowed to rearm after World War 2? (Short Animated Documentary)