Racist rant on Sydney train

Article here:

http://www.msn.com/en-au/news/austr...ght-on-camera/ar-BBBpd6f?li=AAgfIYZ&ocid=iehp

One that that struck me after reading this article is that it was another incident women hurling abuse on public transport.  I have lost count of how many times this happened, but in all the articles I have read the overwhelming majority of perpetrators have been women.

The abuse is usually directed at other women too.

Are women more racist then men?

Are women only racist when on public transport?

Is there any other reason women seem to be the most prolific offenders?  Do women feel safe abusing another woman because they think it is unlikely that the situation will escalate into a physical confrontation?