I usually take the time to review the facts before making up my mind. I listen to arguments by people with a different opinion than me because they generally have a good understanding of things from their perspective. That's how we learn. That's how you get a nuanced picture. Not by immediately dismissing something that doesn't agree with your philosophy.
So true, I would also add that questioning each others opposing POV's is much better than just talking at each other. Making the extra effort to be polite rather than aggressive also helps. Honestly, I ignored bitcoin when I first heard about it until I noticed how often I came across detractors arguing their point in such an aggressive and closed-minded way. Such arguments are meant to end discussion rather than encourage it, and are usually based in dogma rather than reasonable consideration of the evidence. I'd even call the presence of such arguments a contrarian indicator... one person that later apologized doesn't suffice though.