Hmmmm. It's easy to virtue signal about one's lack of bias, but the trouble with bias is that it is not always obvious to the person suffering from it. We all have political views that make some things understandable and others not (and a lot of fairly neutral things in the middle). To someone with different views ours may seem biased, and vice versa. Most people with a modicum of self- awareness can see that.
I could 'excuse' behaviour that is working towards a fairer society, but criticise the same behaviour if it works in reverse, so VAT on private schools is ok by me, but VAT on school uniforms for older children is not. There will be other (probably better) examples, but they are the first to come to mind. The point is that approving of one thing and not another similar one has nothing to do with 'excusing' one party, but is to do with the principle behind the action.
WRT the means-testing of the WFP, there are several issues. I do not 'excuse' the way it was implemented, or the cut-off point being so low (because I believe that the strong should protect the weak) but I am not in favour of giving more money to the wealthy based purely on age, whilst the gap between rich and poor of all ages grows wider (because that is patently unfair). Again, not a party political stance.
Not everyone thinks in terms of Labour = good, and Tory = bad (or vice versa), and it is offensive to suggest that they do.