(2) may be correct.
(3) may be correct.
(4) Yes, but this doesn't indicate causality, nor does it give any reliable indicator of how likely an adult is to abuse a child.
Stop this hypocrisy.
You have already agreed to these facts:
2. Up to one-third of all sex crimes against children are committed against boys (as opposed to girls).
3. Studies indicate that, contrary to the inaccurate but widely accepted claims of sex researcher Alfred Kinsey, homosexuals comprise between 1 to 3 percent of the population.
If a group which comprises 1% of the total population is committing 33% of a particular crime, what does that mean? FRC may not be a reliable source. But it doesn't matter anyway, as you have already agreed with points #2 and #3.