Well Nazi-ism certainly is the theme for just about everything someone disapproves of these days.  Why not clothing choices?  Let's go nuclear immediately because that will convince me you have a rational argument to make.   Not really.  Saying you think it is a bad clothing choice and why, just once is OK..  Every time we see each other, well no, and that is not being friendly.  If it bugs someone that much perhaps they should take the initiative and say they won't be seen together if fur is being worn.  They have already stopped being friendly if they are constantly offering unsolicited advise.    I suppose the next meme I can expect would be "punch a fur-wearer"?