Here, I'll take a crack at answering that question: Because leftists, being the anti-God, anti-good, anti-truth, anti-beauty filth that they are, want to destroy and defile everything that is good, true and beautiful - little children are all three.
Leftists loathe humanity and will attack anyone who loves it.
Then, of course, there's the obvious: leftists, who are currently attempting to legitimize pedophilia, see pedophilia as a "revolutionary act," a blow against the patriarchal, nuclear family and capitalism.
I don't know the stats, but I'd bet a king's ransom that leftists are far, far more likely to be pedophiles than rightwingers. Look at the number of convicted pedos in the Antifa crowd. . .
All you say is true. But I think it’s more personal than just generally the left is Godless. I’d bet that 75% of the loudest of these Godless lefties are major and frequent “consumers” of child sex slaves. They’re terrified that their supply of kids will dwindle.