Your knowledge of history is as poor as your language. Germany declared war on the U.S. immediately after we declared war on Japan. Far from being scared, they clearly were looking for an excuse to fight us directly since we were supplying their enemies. It was only after they declared war on us that we declared war on them.
Your knowledge of history is as poor as your brain. Prior to Hitler invading Poland, Hitler believed that France and Britain would do nothing to stop him, since they gave him Czechoslovakia so easily, but he was fearful of doing anything that would cause the U.S. to enter the war.
Germany declared war on the U.S. in the aftermath of Pearl Harbor. FDR then declared war on Germany.