Political Judgement

According to this article (Heat on PM to cut link to pastor) Tony Abbott has made the call that the Labor party does not have "the degree of Christian commitment" that the Coalition has. So by inference "if you consider yourself a Christian you should vote liberal". I wonder if Mr. Abbott & other 'Chrisitan' pollies have read Matthew 7:

1"Do not judge, or you too will be judged. 2For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you.

3"Why do you look at the speck of sawdust in your brother's eye and pay no attention to the plank in your own eye? 4How can you say to your brother, 'Let me take the speck out of your eye,' when all the time there is a plank in your own eye? 5You hypocrite, first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother's eye.

I think I'm capable of deciding on my own which party best represents my Christian beliefs. This should be obvious anyway because of fath & deeds etc. (James 2:17)