Brouwer's career suffered as a consequence of his disagreements with Hilbert.

EDIT (with links to the political aspect): Letters written more about the politics of publishing than the math itself are referenced in a book called "The War of the Frogs and the Mice" (PDF) http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.224... (see bottom of pg 9 as displayed for the letter Brouwer wrote to Hilbert's wife)