Turmoil

I'm upset with a dear friend.
Last night he posted an invitation on Facebook to sign an online "petition" to rob 'Group A' of their basic civil rights because of their superficial resemblance to 'Group B'. This apparently is justified because the acts of Group B were so heinous that anyone who looks like them should be viewed with suspicion and contempt. Failure to oppress Group A might make Group C feel bad, even though Group A is in actuality a subset of Group C. Group A has no actual connection with Group B, in spite of the specious claims made by a cable "news" organization which are reiterated in this petition. The project that Group A is working on is being entirely mischaracterized in order to provide a rationale for the petition.
I have other friends who would gladly sign this petition, and that's just the way they are. But this friend surprized me because I have never known him to be bigoted or unjust. It's very disturbing.