You may disagree with their ideology, but that doesn't mean they may be always wrong or that you can easily dismiss anything they might point out. Especially since it may not have much to do with their ideology, views. I guess this is my weakness, finding the good in people that I normally never would agree with. Just as I have been surprised (positively) by some people here on FR, that initially gave me an impression of intolerant, even hateful (towards certain people) through their posts while later finding out that it was only because of the specific topic that I had the impression. Overall they can be quite allright. I think you get the picture :)
Which brings us back to your two skinheads and your taking at face value any of the 'facts' they present to you to support their views. I.e, if they tell you the Slovenian Finance Minister is, and 7 of Slovenia's largest banks are run by Jews, (I'm just making this up as a hypothetical, by the way) do you believe them or do you research the matter on your own?
In my view, I'm not lending them any credence and will check everything they say.
Much easier just to get your information from a better source, no?
And if it turns out that they help old ladies across the street in their spare time and have some interesting information in regards to a seperate topic, that's fine - but it doesn't repair the relationship between their views and their credibility in my eyes - the one erases the other.