Well, there are three or so folks here who irritate me on a regular basis and who I've gone back and forth with a few times - I'm sure some feel that way about me as well - that's life, especially on teh internets. I probably can't answer your tech questions but I've never not offered whatever knowledge I have to anyone because of that stuff.

I'd be surprised if anyone got really offended over the choice of models, that's such a petty issue, but everyone's different. Regarding the other issue, I'm sure you knew or should have known that was going to cause a strong reaction - either pro or con. You can view it as conforming to some standard, or you can view it as simply the discretion of avoiding potentially inflammatory remarks in a very mixed bag of people whose opinions may differ from your own. Having said that, I sincerely doubt that the overwhelming majority of people here would refuse help over such issues.  Absent more direct evidence of such a fact, I'd say that you may be inferring something that probably isn't the case. 

There is no single political standard or view here. Everyone here has a common interest in 3D art, but beyond that, they can be liberal, conservative, pro or anti naked art etc. etc. ad infinitum  I was surprised to find that some of the most flat out right wing, probably have a bunker full of guns people at Renderotica :-) So, you never know what's behind door number three and sometimes it's better not to open it. If your conscience requires you to speak out then you should take comfort from having done the right thing and any consequences should be secondary IMO.

"Few men are willing to brave the disapproval of their fellows, the censure of their colleagues, the wrath of their society. Moral courage is a rarer commodity than bravery in battle or great intelligence. Yet it is the one essential, vital quality of those who seek to change a world which yields most painfully to change."
 Robert F. Kennedy

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken