I am not quite sure what you mean with objections? If you mean that people are not willing to talk about those things: I accept it, and stop talking about it. (Aslong as it is no direct issue like those people using the N-word, or being racist in general.)
About disagreement: It would be pretty strange if everyone would have the same opionion? I ask people about their reasons and try to understand their point of view. If they have valid arguments that I was not aware of, I am open to change my opinion.
BUT: If people come at me saying: Climate Change is a hoax, The complete media and science is controlled by the elites etc... Then i stop talking to them, as they would never consider an argument opposing to their opinion as valid.
AND: If someone considers people inferior only because of their gender, their race or their religion? Then I tell them indirectly, to go and **** themselfs.*
* At work I would try to be more diplomatic. Otherwise a whole team dynamic could be destroyed. But In my personal environment, I am as direct as possible. I do not want those people in my life.