newsflash defending someone’s right to be a bigoted asshole doesn’t make you an open minded, principled person, it makes you complicit in bigotry and oppression
Haha, no. That's not how freedom of speech works.
Depends what they mean by "defending their right" to be a bigot. If they mean defending a bigot from government imposed censorship and/or punishment, then defending them doesn't make you complicit in their bigotry. On the other hand, if by "defending," they mean trying to stop other people from criticising them, or making sure the bigot has a platform for their hateful speach, then yes, you are complicit.