Look North to Canada, people live is less fear there and have far fewer guns. Their crime rates are much lower too, especially gun related violent crimes. The USA has a mass shooting a week it seems, some kill none, recent shootings killed 11 Jews and later 12 non-Jews. The country has too many killings in schools and in the streets in businesses and in homes. It is not good to have these things happening, ask why it happens in the USA so much and in Canada so little by comparison.
USA people can be friendly, many are very good people, decent law abiding and generous. Some are different. A few shoot other people and having guns with which to shoot makes them scary. Maybe the loneliness stems from the culture in the USA. Individualism, right wing political capitalism, entrepreneurial people elevated to hero status - hard hitting news program anchors and the like are admired - and it is all so very lonely "at the top" people say. Maybe that's what is at work.