They might not be picking on you. I get some of the proselytizing religious types knocking on my door occasionally. They've never left books, but they often leave pamphlets. They seem like basically good people, but maybe not the brightest among us. Minor annoyances at best.
I only wish the do-gooders and busybodies in our government were but minor annoyances. Fifty years ago when our government left us alone, these do-gooders could be swatted away like flies. Now they are in power. They are just as stupid and worthless as ever, and still have no respect for the rest of us, but now they have the power to make us miserable.