And you, personally, have the authority to tell the Lutheran Church and its affiliated schools how they are to define and prioritize sins because...?
I am not claiming to have authority to tell them how to run their school ..but if the news account is correct, I can and will say that the principal handled the situation very poorly. One male talking to two girls alone, accusing them of being gay and expelling them alone is not the proper way to handle such a sensitive issue. Private churches hold themselves to a higher standard and thus should reflect that standard.