Substantially incorrect
"Evangelism" and its variants refer specifically to preaching the Christian Gospel. The word's tangled roots include "good news", the term often used in English to describe what evangelists push.
Evangelism gets used a lot outside of Christianity to denote, by analogy, pushing a set of beliefs with the object of conversion. That's no different than the present fashion for the loose use of "jihad" and "crusade" outside of their original religious context. But it doesn't negate the essentially religious character of all these terms.