Because they are evil?
Converting the next generation into sexual partners.
Forty-six percent of the homosexual men in contrast to 7% of the heterosexual men reported homosexual molestation.
Twenty-two percent of lesbian women in contrast to 1% of heterosexual women reported homosexual molestation.
Source: Comparative data of childhood and adolescence molestation in heterosexual and homosexual persons.
https://www.ncbi.nlm.nih.gov/pubmed/11501300
Prevalence of sexual abuse of homosexual men ranges from 11% to 37%.
74 percent of bisexuals had been sexually abused as children.
Source: History of Childhood Sexual Abuse and HIV Risk Behaviors in Homosexual and Bisexual Men
https://ajph.aphapublications.org/doi/pdf/10.2105/AJPH.2005.071423