Romans 1:27 "In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed indecent acts with other men, and received in themselves the due penalty for their perversion."
The due penalty for this perversion is outlined here:
Leviticus 20:13 "If a man lies with a man as one lies with a woman, both of them have done what is detestable. They must be put to death; their blood will be on their own heads."
If you examine these divine scriptures closely, it will become inherently obvious as to why homosexuals would be unable to successfully raise children, or do much of anything else.