EVs have their supporters. So do diesels.
I happen to like and support both. I guess my "green" credentials have a shade of blue to them.
It's really not an either/or proposition. There are tasks that diesel is still by far the best choice, i.e. long distance and trucking. Tesla and Nikola can both make a lot of noise about their upcoming long haul trucks, but it will be years if not decades before they will be able to replace diesel.
EV is outstanding for local to moderate distance driving, say up to 200 miles. Go beyond that and you have to consider locating a working fast charge station, and then waiting to "fill it up". But have great low end power, with an EV being even better since full torque begins at zero RPM. Both are more economical than driving a comparable gas power vehicle.
EV is a much tougher call if you don't have a dedicated place to park that you can install an EVSE for charging. This includes apartment dwellers, or people with homes that don't have off-street parking. And as noted, new EVs aren't cheap. Also, some areas of the country have electric rates that make an EV far less economical.
When I had my Passat TDI, there was a nearby Shell station that was doubling my Kroger fuel discount, so I was getting diesel sometimes as low as 30-40 cents a gallon. My per mile cost to drive was around 3 cents. Once they stopped doing that, my per mile was still around 5-6 cents. Now with my PHEV, based on my Fuelly monitoring, my cost per mile for gas is about a penny. Adding my electrical use, I am no more that 4 cents per mile total. But electricity in Washington state is pretty low, and very little of it is coal generated. For other parts of the country, the cost to charge an EV could easily make the cost per mile between EV and diesel about the same, or even perhaps but diesel ahead.
Right now I'm locked into a three year lease, so I'm just a bystander at this time. I believe that by mid-2022 I can pick from a number of vehicles that offer the driving range I desire, the options I want, and a price I consider reasonable. My hope is that an EV will meet all my requirements. But if VW does return with a TDI, and they put it in something like the current Tiguan, or slightly smaller, I would seriously consider it as well.