The Meaning of 'Umar's Statement: "What a Good Innovation"

Question:
Is 'Umar's statement that it is an innovation a matter of linguistic analogy, or is it a linguistic innovation?

Answer:
Bid'ah (religious innovation) is of two types: linguistic bid'ah and legal bid'ah. Linguistic bid'ah is a thing that people have not previously accustomed themselves to; it appears without a prior example. "The Creator of the heavens and the earth" means the One who brought them into existence without a prior example. This is a linguistic bid'ah.
When 'Umar gathered the people behind a single imam for the tarawih prayer, he did not introduce a legal bid'ah, because this is the Sunnah of the Messenger (peace and blessings be upon him). The Messenger (peace and blessings be upon him) prayed with his Companions for nights in Ramadan as a congregation, with him as their imam. Then he stopped doing so, fearing that it would become obligatory upon them and they would not be able to keep up with it.
When 'Umar came, he revived the Sunnah that the Messenger (peace and blessings be upon him) had practiced, because the time of legislation had ended, so he did not fear that it would become obligatory, as there is no obligation after the Messenger (peace and blessings be upon him). Thus, 'Umar revived the Sunnah that the Messenger (peace and blessings be upon him) had practiced in the nights in which he led the Muslims in prayer. He did not bring a legal bid'ah; rather, he brought a linguistic bid'ah that people had forgotten, so he revived it as if it were something new, because people had forgotten it. Thus, 'Umar revived it and reminded people of it. Yes.