No, he never advocated for "child rape." He advocated for sexual relationships between minors and adults. I find it disgusting, but to say that he supports child rape is simply flat-out wrong, and it is a smear.
The presumption is that a child can not reasonably be assumed to have adequate agency to assent (especially in regards to power relationships etc), therefore any contact is inherently non-consensual and thus by definition "rape".
I can abstractly conceive of philosophical arguments around emergence of ability to consent, but here in the real world I am solidly with the majority on this one.
