I think it really depends on the purpose. When the jews on Twitter for example are posting things like "us whites need to stop the violence and help our refugee brothers from muslim countries", well, in this case they themselves identify as white. In the hope their message will be better received, by whites who feel comraderie. But in reality these are evil shifty shape shifters who in the very next twatter post may exclaim proudly "my mom was Jewish and when raising me, made sure I knew my true identy was. Jewish. I'm very fortunate to of had her!!!"