I've never argued that all Stormcloaks are racist.
I don't believe that to be true anymore than I think that any Imperial loves the Thalmor. There
are racist elements within the Stormcloak faction (ie. some sympathizers) and it is easily argued that Ulfric is shady when it comes to that aspect. His inactions as a leader speak quite a bit, even if he's not bitterly hateful.
Out-of-hand dismissal of an example of a Stormcloak Jarl behaving badly aside, the Jarls all come with their own set of baggage, having quite a bit to do with the fact that they're rather independent in their governance and embark upon their own deals and mandates. But yeah, I wouldn't necessarily look to the Jarls for the sole definitive evidence of one side being awesome or not.
And lol, I think we've all taken this to the broader Civil War topic in some fashion, so no matter. In a way, it always seems to come back to it anyway when discussing Ulfric in any capacity.