Nuclear hasn’t suffered because of environmentalists protesting.

Nuclear has suffered because it is expensive and uneconomical. The only way it is even feasible is by having laws that protect the owners from liabilities caused due to catastrophic failure.

Blaming environmentalists gives them way more power than they possess. Environmentalists have struggled to even stop pipelines running through the US whose sole purpose is to make Canada richer. Far more than environmentalists it’s NIMBY folks who have affected nuclear (but still not as much as basic economics).