because they lost and some winners had some credit debt so they decided to take it from germany. they also wanted to strangle germany because they thought it would becone too strong, toppling the european balance of powers. especially england was mad because germany had ties to ottoman empire and entete colonised countries. they wanted to build a railway with/for the turks reaching to basra ar persian gulf. this would weaken the powers of suez channel because you could transport goods by train and access to basra would give them a path to asia and oceania without the suez bottleneck. and ottomans and persians wanted to give them access to oil. they feared germany could try to install some brics equivalent. thats what i think.
Germany