France -wanted revenge, as most of the war had been fought in her country and so they needed money and raw material to rebuild her, from Germany. Also wanted to demilitarise Germany as a way of protection.
Britain -wanted less punishment than France, because they had little damage, but they still wanted money from Germany as the war had put Britain into debut.
USA -wanted even less punishment as they had suffered the least during the war. But they wanted world peace.
All the 3 countries had different attitudes towards Germany because they had all been affected in different ways during the war, so they wanted different revenge on Germany.