This is pretty pathetic. The language uttered was clearly a hate crime and was considered so by the police who charged the likely perpetrators. The CPS reviewed the evidence and found that it did not pass its test for a likely conviction. That is the job of the CPS and it happens every day.
One of the articles says the Jewish Community understood the rationale for this even though they were appalled that no-one was brought to justice. Which bit of this is the police or the CPS showing favour in a way that say, you or the current Home Secretary would recognise?