Apparently you defend a clique putting out the claims that all the autism cases are 'just' genetic defects of the parents
That shows how very little you know about actual autism research.
We know that it seems to be triggered by more than just genetics. Encephalitis in the child (which can be caused by a variety infectious organisms) and the mother contracting rubella during pregnancy are just two of the things that seem to be able to trigger it which have nothing to do with genetics. There are more potential causes as well, but you wouldn't know that because all you've bothered to read is anti-MMR propoganda.
While there are genes that make it more likely that a child will develop autism, they do not guarantee that it will happen and no autism researcher has ever claimed anything of the sort. The only place that argument gets made is in straw man arguments put forth by anti-vaxxers like yourself.