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You're 100% right and I've read a lot of similar research recently (listed below) that clearly indicates that if you engage with people, and present arguments, they are ready to change their views.
I do engage with people who I don't agree with (be it racism, be it environmental issues, be it politics) and while this can be very frustrating sometimes, I still believe it's definitely worth it.
https://onlinelibrary.wiley.com/doi/full/10.1111/pops.12568
https://onlinelibrary.wiley.com/doi/full/10.1111/tops.12187#.XtezlXanM1o.twitter