Serious Question

Homosexuality used to be considered a mental illness in the past, and right now pedophilia is also considered a mental illness. As time passes by, will pedophilia also be accepted just like how homosexuality has been? When I came out, my homophobic brother said, "Why draw the line between homosexuality and pedophilia? Homosexuals can't control it, they were like that since birth, pedophiles are the same." And that really got me thinking about this topic.