How did Kaiser Wilhelms insistence on building up Germany's military make Germany less safe

The reign of Kaiser Wilhelm II as King of Prussia and Emperor of Germany from 1888 to 1918 saw the meteoric rise of Germany as an economic and military power.

Explanation:

in Germany's humiliating defeat and the abolition of German monarchical rule.

Kaiser Wilhelm’s foreign policy differed from Bismarck’s in many ways. Whereas Bismarck did things based on logic Kaiser Wilhelm did things more based on emotion. This resulted in incoherence and inconsistency in the German relations with other nations.

Wilhelm wanted to an empire to rival the British Empire.

He also managed to alienate the English by aggressively expanding the navy. He was more aggressive and wanted Germany to be the best.

The more you spend on the navy and army the less money for the general public. and when other countries see you building up a navy they get worried and build up theirs. And then things can get sketchy because other countries feel threatened leading to a possible declaration of war.