Electric car is a good idea from climate perspective if you can charge it with 100% carbon-free electricity. Then the benefits do outweigh the increased cost, but that applies to the whole society and not to you. If you consider only your own benefit, the benefits don't outweigh the increased cost.
Note you need 100% carbon free electricity. If 90% of electricity is coming from carbon-free sources and 10% from carbon-producing sources, everyone is equally guilty of the rest 10%.
If the carbon free electricity is coming from solar, can you charge your car during the winter? Probably not, so you need a battery that lasts for >100 days of driving. No electric car has such a battery.
If the carbon free electricity is coming from wind power, can you charge your car during an extended 10-day non-windy period (statistically speaking, non-windy periods don't usually last more than 10 days)? Probably not, so you'd better have a battery that lasts for 10 days of driving. Most electric cars don't have such a battery or the cost is absurd.
If the carbon free electricity is coming from nuclear, eventually the plant will be decommissioned and you can't charge your car anymore unless you can afford to fund your share of the construction of a new nuclear plant. Nuclear is ridiculously expensive today, so it probably doesn't make sense to fund the construction of a new nuclear plant.
What about hydropower? There is not enough hydropower to cover all needed electricity use, and it can't be constructed anymore as resources are nearly 100% utilized.
My choice? I have an electric car charging station in my house, but I don't have an electric car yet. I'll continue to drive with gasoline and the next car I'll purchase will probably be a plug-in-hybrid electric vehicle. Because of the absurd taxation in my area (electricity tax is ridiculously low, gasoline tax is ridiculously high), it makes sense to drive using electricity even when it's not windy.
Electric car when charged with coal-fueled electricity doesn't make sense, so if coal generation is still used in your area, it's a good idea to drive using gasoline during the periods when the coal plant is actually turned on. So, I actually recommend a plug-in-hybrid electric vehicle instead of an electric car.