School suspensions: Black boys are suspended at about three times the rate for white boys, and black girls at nearly four times the white rate

Is this evidence of anti-black discrimination? If yes, then does the fact that Asians are suspended less often than whites prove the existence of anti-white discrimination? Or do the racial differences in school suspension rates merely prove that blacks are more likely to misbehave than whites and whites are more likely to misbehave than Asians?