For convenience, yes. I can’t come up with and remember a different password for each different website.
You won’t win this argument here though. These people don’t know the difference between conservativism and US Republicanism.
I think you bring up very good examples. The communists in China with their cultural revolution is another example of progressive policies gone wrong. Children undergoing sex change operations and later regretting it could possibly be viewed as one in a few decades. (Examples of these do exist and their stories are heartbreaking.)