We Never Know
No Slack
That's like saying we shouldn't talk about MLK and the civil rights groups because they were entirely political movements. Hell there's still people against interracial marriage today, for the same stupid reasons people are against gay marriage. I don't care if their kook religion doesn't want human decency in schools. I don't feel very inclined to stay silent so they can maintain an 'impartial environment.'
Put them all up in the classrooms...
Religious, gay pride, straight pride, blm, etc.
Different students will identify to them all.