Perhaps you'd like to find a published scientific source from the last hundred years that suggests speciation takes place suddenly, in one or a few generations.
Why would I? I have to respond to the nutball arguments as they come at me. The story I'm dealing with re: evolution is different depending on who is doing the talking for the evolution side. I would suggest that so many things have changed in the evolution story that none of you are on the same page as a result. Just a guess; but, likely accurate.
It also fits the smoke and mirrors ploy.