so ideologically different that you can not tolerate their opinionthat still doesn't require me to stay away from them.
if there is an opinion so bad that it actually is intolerable, (which the kkk obviously represents) then it is on us to do something about it. none of that affects whether i ought to socialize with these people or not. it only affects why. if my goal is to change them then i should be allowed to do that.
social ostracization of aggressive, intolerable groups is an effective strategy
effective to do what? to change their mind? i'd like to see some evidence for that, because i don't believe it. ostracization only strengthens people in their opinions. it may make then unable to spread their ideas, but it doesn't help them change.
ostracization also can end up hurting the wrong people. those who want to get out but can't because they don't have anyone helping them. it causes people who are actually unsure get stuck because they have noone showing them that there is another way. it causes people who realize that they are wrong being unable to get out because they have to fear to end up being completely isolated. they don't know that there will be others who welcome them. for all they know they have to expect to remain shunned because they are afraid could not convince anyone that they changed. (this is made even worse by todays climate of ostracizing people for things they said years ago. you said something racist on twitter once, and noone will ever believe that you learned your lesson for the rest of your life)
changing your opinion and then finding new friends looks easy from the outside, but very risky from the inside. finding new friends, and then have those friends help you get out is the only way.
it's up to us to be those friends.
a problem here is also who decides who ought to be ostracized. i should have the right to associate with whoever i want. it's not anyone's place to decide whether i am capable of avoiding to get influenced by those people or not.
if you are a close friend who knows me well, you may be able to tell if these people are getting to me or not and you can tell me, or help me avoid that influence. if you aren't already a friend, then your only option is to become my friend and find out. and if necessary help me understand that these people are influencing me. but if you ostracize me because i am not doing what you think i should, then you will achieve the opposite of what you set out to do.
you see, it's friends all the way down. and all the way up. the only way to change the world, is to change its people, one person at a time.
ostracization leads to disunity, and disunity leads to war. the well-being of the worlds society, its peace and security can not be achieved if we keep ostracizing each other.