Should Homosexuals have the same rights as other human beings? No.
For many reasons, I cannot justify that answer. Of course they should be allowed to adopt. If your afraid that they are gonna make their children gay, than your essentially thinking that being gay is wrong, which is another problem entirely. If your worried about the child being insecure, what child isn't insecure. The idea that gay parents would provide a bad example is the assumption that the standard male/female parents is awesome and always works. Everyone knows that no parents are perfect, and when all is said and done its more important that your parents loved and supported you as oppose to whether or not your manly dad taught you how to throw a football.