Well, the thread is in its third page, so it is long enough that I will answer too.
For me, this question is too broad for a general answer to accurately address it. It almost entirely depends on the individual, my relationship with them, and exactly how the prejudice manifests.
I believe that everyone, without exception, has some degree of prejudice in one way or another, and the best we can do is try to learn, understand ourselves and others, and keep any prejudice in check. Thinking of ourselves as perfectly free of prejudice is, in my opinion, a guaranteed way to become overconfident, judgmental, and ironically prejudiced.
This means that my approach to a racist, homophobe, transphobe, etc., will depend on what I think they know about the subject, what their intentions are, how open they are to associating with me rather than staying in an echo chamber, and what their attitude is toward others in general—among many other factors. When someone who, for one reason or another, finds some of my beliefs "immoral," "harmful," etc., associates with me while knowing about said beliefs and remains open to discussion, that means there is a bridge between us and a door that I generally prefer not to close unless I see strong reasons to do so, such as, say, seeing someone actively harm other people (e.g., by cheating or being dishonest) based on their prejudice toward them and refuse to consider or discuss the effects of their actions.
I don't think it's possible to have a "morally pure" social circle, nor is such a level of homogeneity something I find desirable or healthy. I live in a society where the vast majority of people believe that LGBT people should be legally penalized, that "apostates" should be punished, that gender equality is harmful, etc. The facile way for me to look at this would be to say, "Every single one of those people is a bad and immoral person." The nuanced view is to consider the role of culture, upbringing, peers, information, social circles, and individual factors (e.g., personality and personal experiences) in shaping people's views and values—even when those views and values directly or indirectly cause harm to a subset of people.
In my opinion, the proliferation of social media has introduced and amplified a new level of one-dimensional assessment of certain issues pertaining to religion and politics, where people are judged as either morally pure or irredeemably hateful.