1. If West Germany is reunified by force, it will be a protracted war:
Germany was the initiator of World War II. They have created many human tragedies and brought great losses to the world. With the end of World War II, the Soviet Union and the United States began a comprehensive contest in the post-war world. So in the end, Germany split into two countries with different political forms: East Germany and West Germany. West Germany is much stronger than East Germany in territorial area and economy, but don't forget that East Germany has always been an ally of the Soviet Union. If West Germany goes to war, then East Germany will get the support of the Soviet Union. Although the strength of the Soviet Union declined at that time, it even disintegrated. Even so, Russia with excess weapons and equipment will still help East Germany a lot. So if West Germany starts a war, it will be a huge crisis, because this war can't be ended soon, and it will even cause a series of countries to join and become a protracted war.
Secondly, West Germany will make a huge economic comeback:
West Germany must pay a huge price economically because it needs to expand its own army against East Germany. But militarily, West Germany has always been controlled by western countries, so it has never established a strong army. Therefore, after the war, West Germany needed to continuously expand its assets. In this case, the funds will get bigger and bigger, which may eventually lead to the total collapse of the West German economy.
Third, Germany is likely to eventually become a scorched earth:
Germany is a small country. Once war broke out between East and West Germany, it would be a scorched earth in a few months, so the end of this war was Germany, which became a poor and weak country.