They both hate Christianity
Spot on. We all have a God-shaped hole, and since the Left are 99.9% Godless, they try to fill that hole with anything and everything. When the cause du jour leaves them empty, they fill that hole with the next one - and the next - and the next...
There's only one thing that'll fill that hole and bring true and lasting peace. Be vigilant against the Left's schemes, but also continue to pray they'll come to know the truth.