I am terribly sorry for your dad's experiences and understand how that would colour opinion mixed with how times were different and societal views have changed.
But to hold a whole section of society responsible for a tiny teeny minority's actions is obviously not right. However I can understand how abuse can prevent clear thinking on such issues.
A couple of people referred to this and I dont believe you can say my fathers reaction isn't right. I have travelled all over the World and in some parts I have encountered scepticism and racial judgement for being white, particuarly in parts where communities have encountered negative attempts by white people to exploit or where white people have been rude or misunderstanding of the culture they were in. I would never blame those people for their reaction to me because unfortunately thats the way humans operate. If you get burned you tend to associate that in the future and that association can be on colour, religion, anything. But if what happened to you at the hands of someone/many people is that strong, you cant help but judge in the future.
On the gay adoption thing, a poster later in this thread referred to the 'intolerance towards gay adoption'. I personally wouldnt describe it as an intolerance. It is right that people have an opinion on it and that it is not just regarded as outright acceptable because it is an issue of society. Judgement on certain things I would regard as an intolerance such as race because you are born the colour you are and God or nature meant for us all to be that way so to judge someone on their colour or have an opinion on the rights or wrongs of it is just unacceptable. However gay adoption is like euthanasia....because it is not physically possible and is not what nature intended, it must be ruled on by society and that will always draw differing opinions. If someone were to call me intolerant just because I am not sure I agree with gay adoption, it would displease me greatly and would be unfair I think.