You are not wrong in saying that a person known to be right-leaning is going to be more poorly-received making these kinds of comments than someone known to be left-leaning. (I think it’s a matter of opinion if you think it is fair to take a person’s political leanings in mind when responding.) As a left-leaning board that is to be expected.
However… The community doesn’t just give someone a pass for making racial remarks because they are professed to be left-leaning. Case in point…
That was a poster who was on the left side of the aisle who was identified as both a racist and a misogynist and was raked over the coals for it. People don’t just get a pass because they express liberal opinions. People on the left get called out for those things on this board routinely.