No, no you were not harsh. If you feel strongly that they shouldn't be raised together, that's perfectly fine, and something that the OP needs to consider. I've raised large fowl, bantams, quail, ducks, and one turkey. The only issue I had with mixing little ones together were the ducks and...
So I am guilty of one thing that I hate about this site. Answering without really "knowing" the answer. My apologies to @Jaybird14 I should have kept my guess to myself. But I do appreciate being corrected, and I learned something about Valley quail! :)
Do the Calif valley quail take longer to hatch? I'm not familiar with them, but Usually most anything that hatches and are raised together should do fine. May be smart to be prepared with plan B, just in case they don't get along, but I'd guess they would be ok.