The Indiana Board of Rabbis is a Leftist front group. They are nothing but Rat shills masquerading as a religious group.
http://indyjcrc.org/indiana-jewish-community-opposes-executive-order-bar-immigrants-refugees/
Anybody can call themselves 'Jewish'. Anybody can call themselves 'Rabbi'. There is no controlling body to verify if any of these people are actually Jewish and if they or actually Rabbis. It is the same as all the Black radicals calling themselves Reverend or Bishop with no actual credentials at all. Same thing.
I've seen it a hundred times. I go into a what I call a "Jews for" rally, and found that nobody there was actually Jewish. I went to a Jews for Jesus rally just to look around. And no one there was Jewish.
I went to a Jews for Palestine rally, and they were all antifa radicals and Muslims.
This is a tactic by the Left to try to co-opt religion to give their protest more notoriety. If you see a protest title Catholics for Islam, who is going to go and verify if any of those people are actually Catholic? Nobody will. And they know this. But that won't stop some guy dressed up as a priest from giving interviews on whatever news channels happen to show up.
It is all just more Leftist tactics and lies. As usual.