The author does not speak for the Black Lives Matter movement, nor for the vast majority of people who use that phrase. The use of "we" in the title is egoising.

A quick search of "what does 'Defund the Police' mean" will find that the vast majority of proponents, and of articles written about them in almost all newspapers and magazines, interpret it as reducing the budget of the police and redirecting that budget into non-violent community aid.