Immigration and gay marriage and women’s rights etc. are scapegoats. The real problems are international competition (unskilled workers in developed countries have to compete with unskilled workers in Thailand and Bangladesh and Indonesia), automation (the US has higher industrial production than ever before, but it takes much less labor), changing tax laws and easier travel/communication/money movement (letting rich people live far away from production and markets, and siphon their wealth into tax havens), break-down of civic institutions (labor unions, churches, public services, local newspapers, etc.).