Answer:
Because some points in the 14 points took out the autonomy and the power from Germany, especially important and strategical territories. Also, the treatment toward Germany by the winners was one of the reasons for the rage and the desire for revenge. They blamed Germany for all the misery and loss caused by WWI.
Step-by-step explanation:
The 6th, 7th and 8th points demand the evacuation of German troops from Russian and Belgium, the Balkans and France (including the contested region of Alsace-Lorraine), and giving these territories to France. The iron in the Balkans and the shame to loose Alsace-Lorraine was terrible for Germany. Plus, the Treaty of Versailles proposed a reduction of the German army and the fabrication of weapons. One way or another, the 14 Points of Wilson and the Treaty of Versailles was the seed of WWII.