Less "multiculturalism" and it would be a none-issue. When we had a country full of people of Northern European descent there were shooting ranges at high schools. High school. Teenagers with guns. Yikes. I thought they were supposed to be in playpens?
No one else is going to speak up for us as an ethnic group but us.* (Until then, we are the implicit group being called racists based on imaginary nooses at the UofD. We are the cops that are supposedly just running around shooting black people for the fun of it. Implicitly that's your brother, as he is the ethnic target of the people responsible for imposing diversity on us and only us as a group.)
*Although there are actually some Chinese people and other ethnic groups that stand up for us more than we stand up for our witless selves. We are witless as an ethnic group because we don't seem to realize that we're the people that like things like hiking and all of the usual customs and traditions of the people of the North. Get out your violin, etc. We usually like hiking with dogs (the wolves that our ancestors tamed) as we prepare for the winters of the North and Christmas with our kith and kin. But Muslims from the South consider our dogs unclean and have different customs, so they're likely to join the multicultural "war on Christmas" created by a different foreign ethnic group. Etc.
People of the North don't see ourselves as a tribe (the forests of the North) because we're supposedly individuals (trees) interchangeable with everyone else in the world. But we're not interchangeable.
We are who we are, with our kith and kin... so we tend to be in tune with our ancestors and their works of art and customs and on and on. When Rowan goes to Amish country she probably feels at home with our heritage and history or more rooted in our country. When a Japanese person does that, they're a tourist. I'm rambling but that's the only way to get to the big picture. Otherwise people can't see the forest of their own existence as a group for all the individual trees that they want to focus on.
Our customs and traditions with respect to guns while we're targeted with diversity/diversification as a group are a side issue. Although I would note that when the high schoolers had guns in the past, they didn't just randomly start shooting each other. Perhaps everything is a lot less scary the more knowledge that one has about it. Otherwise it all looks very mysterious. (Is the idea of Mark with a gun scary? Well, actually it might be... but I'm still for it!)