Of course you are absolutely right and those who are calling for students to carry loaded weapons into the classroom are absolutely wrong. I don;t see where Our Lord commanded us to carry weapons with us to defend ourselves. In fact, He advised us to do just the opposite.
You have heard that it was said, ‘An eye for an eye, and a tooth for a tooth.’ But I tell you, do not resist an evil person. If someone strikes you on the right cheek, turn to him the other also. And if someone wants to sue you and take your tunic, let him have your cloak as well. If someone forces you to go one mile, go with him two miles. Give to the one who asks you, and do not turn away from the one who wants to borrow from you.
—Matthew 5:38-42, NIV
And in the Gospel of Luke:
But I tell you who hear me: Love your enemies, do good to those who hate you, bless those who curse you, pray for those who mistreat you. If someone strikes you on one cheek, turn to him the other also. If someone takes your cloak, do not stop him from taking your tunic. Give to everyone who asks you, and if anyone takes what belongs to you, do not demand it back. Do to others as you would have them do to you.
—Luke 6:27-31. NIV
Now shall we follow the words of Our Divine Lord and Savior on this or not?