Ya I get that. Part of the problem surrounding nutrition specifically is there is an abundance of conflicting information sadly.

Open dialogue and communication is key! I love hearing out my friends with differing opinions - sometimes I learn new things.

I remember one friend for example her husband is a farmer and they use pesticides. I was VERY against pesticides - and she was offended. She explained how key they can be to farmers.

Now - did it completely change my mind? No - but it opened it and I understand her side more and why she was passionate about the situation.

That was a bit long winded - but all to say coming from a place of openness , and being less judgemental could definitely improve the chances of salvaging the friendship - and possibly open the friends mind up a bit to veganism.