There is some speculation that Jesus was associated with the branch of Judaism whose group name is Essenes.
In the 1st century BC, the Essenes were apparently rivals for orthodoxy with the Pharisees or a group close to the Pharisees (and with the Sadducees, to paint the whole picture). One of the Dead Sea Scrolls that enlightens this rivalry, in vivid terms, is called Pesher Nahum (interpretation of the prophecy of Nahum). Their criticisms of the Pharisees or a group close to the Pharisees is complete, saying that they mislead the people from the truth and lead people away from the observance of the Torah (God’s “instruction”).
And the author of Pesher Nahum refers to that rival group by a nickname, the Seekers-after-Smooth-Things.
If this fits together as the modern commentators indicate, then Jesus seems aligned with the Essenes, at least in a general way. Another person mentioned in that scroll was someone who was referred to as the Teacher of Righteousness, the teacher of the Essene perspective on the Jewish law.
The animosity between these groups may be the basis of such a statement, by John the Baptist (I think, or Jesus) who referred to the Pharisees as a “brood of vipers” and “hypocrites.” Whether this is specifically true or not, this was the sentiment between these major groups in Jesus’ time.
(Of course, if Jesus was aligned with the Essenes, he would not have been around the Jerusalem temple so much, which they did not recognize.)
This is my ‘take’ on what I have been reading lately.