Was Jesus the first to bring in 4th Density vibrations?

[Siren]

Was Jesus the VERY FIRST entity to bring 4th density vibrations into our 3rd density?

No.

Firstly, all the records humanity has right now concerning their history can only (partially and fallaciously, at times) account for the last 6,000 years, give or take. That leaves about 70,000 years of non-recorded/remembered history. Plus, not all "wanderers" have made it into history/religious books. The Jesus you speak of has become a renowned personage of history due to the Catholic Church (Jesus is to the Catholic Church what Mickey Mouse is to Disney—every businessman knows he needs a good advertising logo to promote and sell his products/services). However, Jesinavarah's identity and message has been greatly corrupted over time.

The heart of Jesus' message was simply this: love thy God/Creator, love thyself, love thy neighbor/brother/other-self.

Secondly, the 4th density isn't "brought" by any single individual entity. The transition between 3D and 4D is a natural process that occurs over time.