It depends on how you want to spend your time, right? Fully agree you can change people, but is that worth spending your time? Do you have other goals in life?
I recall a moving story to me on ... "This American Life" on NPR, which had a story about the most moving way for people to change their minds on polarizing issues, is to spend lots of time talking & hanging out with people who lived personally with whatever is the opposing views in a civil manner.
The example at the time was based on groups not accepting the gay lifestyle spending time with those who were.
But just because you try, doesn't mean the other person is ready to accept. So like in chaos theory, you have to plan on failure..... hope for success.