From my point of view I dont see what the big issue is. A car engine is a car engine. Runs on petrol or diesel or liquid gas or H2O or whatever, they all have pistons and valves. (except the Mazda RX)
A good mechanic is the one that can handle both imo.
But I grew up around Diesels so maybe I got it all wrong, not knowing how things in the US are.
Modern Diesel and Petrol engines are (apart from the sparkplugs) very much alike. Now with the introduction of high pressure direct gasoline injection
(VW TSI engine for example) even more so!
What I find troublesome about this new generation of mechanics is their ability, or better said the lack thereof, to make a proper spot on diagnostic of a problem.
If the computer cannot tell them what to do they are lost.
I still use common sence. A computer cannot tell me if there is petrol in a diesel. My nose can.
Ok, complained enough now
