It is also possible that Bob is racist in the sense of successfully working to cause unjust ethnic conflict of some kind, but also Bob only says true things. Bob could selectively emphasize some true propositions and deemphasize others.
Sure, though this is equally possible for the opposite: When Alice is shunning or shaming or cancelling people for expressing or defending a taboo hypothesis, without her explicitly arguing that the hypothesis is false or disfavored by the evidence. In fact, this is usually much easier to do than the former, since defending a taboo hypothesis is attached to a large amount of social and career risk, while attacking a taboo hypothesis is virtually risk-free. Moreover, attacking a taboo hypothesis will likely cause you to get points from virtue signalling.
Sure, though this is equally possible for the opposite: When Alice is shunning or shaming or cancelling people for expressing or defending a taboo hypothesis, without her explicitly arguing that the hypothesis is false or disfavored by the evidence. In fact, this is usually much easier to do than the former, since defending a taboo hypothesis is attached to a large amount of social and career risk, while attacking a taboo hypothesis is virtually risk-free. Moreover, attacking a taboo hypothesis will likely cause you to get points from virtue signalling.