[Mark17]

... The movement known as Buddhism revivalism or Protestantism

Buddhism revivalism or Protestantism? Horse hockey. I don’t think the two can be mentioned in the same sentence.

[Cronos]

I thought it was a strange choice of words as well, but I think they are taking the term "Protestantism" as a generic terms for change.

I don't use the term Protestant to club together various non-orthodoxy Christian groups as the various groups there are too diverse in beliefs - from Lutherans all the way to Oneness Pentecostals (who reject the Trinity) and even the Universal Unitarians were an early offshoot (pre-Anabaptist).

It is far better to address Baptists as Baptists, Methodists as methodists etc and respect their differences in beliefs

Otherwise the umbrella term can become so wide that it could even be used as in this article.