"It is time for all members of our profession to acknowledge that mathematics is created by humans and therefore inherently carries human biases. Until this occurs, our community and our students cannot reach full potential, reaching this potential in mathematics relies upon the academy and higher education engaging in critical, challenging, sometimes uncomfortable conversations about the detrimental effects of race and racism on our community. The time is now to move mathematics and education forward in pursuit of justice."
See direct quote above, mathematics organization is saying the mathematics community needs to address race and racism.
They are not claiming that maths itself has racial bias.