They don’t fear religion, they loathe religion.
The bedrock of liberalism is no rules. Religion is all rules. Religion regardless of the faith is the sum total of how to get along in a civilized society.
Free love, the negro disdain for the family, the hippie attitude towards drugs, the disdain for business, the disregard of tax laws, and on and on represent the loathing of religion and the rules that bind.
Don't know where you picked up THAT idea. That's a 'liberal' idea, not a racial one. After the time of slavery, and until the advent of LBJ's Great Society, most black families stayed together, and worked hard to get ahead. This went on even in the face of segregation and Jim Crow laws, and the black middle class was growing steadily.
Beginning in the 60s, liberals began working hard to make poor families dependent on the government, thus beholden to Democrats. With their monetary policies, they made it impossible for fathers of poor families to live with their children, but still get monetary support, if needed, from the government. This brought on the attitude that no one needed fathers in the house, and girls could have babies and get money from the government.
This attitude has almost ruined black families, but it knows no race, and now there are as many, if not more, poor whites taking advantage of these government programs as there are blacks.