I don't agree and I am not a fool, thank you. I dare say, it is a good bet that I am a considerably bit older than you are and have seen a good deal in my time on this earth. If genetics played the greatest role, than a mixed-breed dog would not be as animal aggressive as a purebred pit bull. Not true. It is, in fact, more difficult to socialize a dog that 1/2-3/4 pit than it is a pure bred pit. Why? I haven't a clue, but I have seen it numerous times and believe it is true at least most if not all the time. It would also be easy to breed out the aggressiveness if it were purely genetic. It would also mean that ALL pit bulls would be equally as aggressive. In fact, I know that not to be the case. I have fostered nearly a dozen pit bulls (about half mixed and half pures) in my day and found that the pure bred pit bulls (especially the males) who have not been abused to be very gentle and dog friendly. Females are bit more complex for what reason, I don't know.
I personally prefer mixed-breed because they tend not to have the medical problems of pures and, IMO, are smarter and easier to train. The exception again, being the animal aggressiveness in mixed-bred pits. It does not appear to matter with what the mixture is, except possibly in the dog's strength being noticeable greater when mixed with another strong breed, i.e., rottie, dobie, etc.
If you wish to learn something from outside your own sphere, I would suggest that aside from sharing your own experiences, you listen and garner the benefit of the experiences of others and stop calling people who may not agree with you (who may KNOW better) names.