Democrats aren't on the left side of the political spectrum, but it appears they can use this software. (Yes, they are called the left in the US, but the mainstream positions of the Democratic party are globally center or center-right.)
But also, I would argue that modern leftist parties tend to be less interested in human rights violations and more interested in taking care of everyone (even if that means taking wealth away from the wealthy, which many would consider violative but probably isn't "contempt for human rights")