If the left so desperately wanted to keep the church out of the state and out of the SCOTUS, then they would have to ban people of ALL faiths (Jews, Muslims, Buddhists, etc) and all Christian denominations from becoming justices.
That would leave Athiests as the only people qualified.
Liberals are Stupid.
The SCOTUS, in 1961, referred to secular humanism as a religion. The left doesn't want all religion out of the state, they want THEIR religion IN the state.