Yes, these quotes are indeed very well known. Thank you for reinforcing my point.
Matthew 5:38 — He advises his followers not to retaliate when attacked. He does not tell them to go out and disarm anyone else, or petition the Roman government to hypocritically do so on their behalf.
Mark 12:17 — When the Pharisees attempted to entrap Him with a question when could not be answered either "yes" or "no" without enraging either the Romans or the religious leaders, He evades the original question and turns it into an admonition to give people (and God) what they are due. Note that he never actual said that the coin was owed to Caesar, though many people seem to assume so. He only asked whose face was on the coin. The idea that not just the tax being demanded but all coins actually belonged to Caesar just because his face was stamped on them would rightly have been considered ludicrous. And no matter how you take that conversation, the fact remains that he never made any comment on the merit of the taxes themselves. There aren't any statements in support of the practice of taxation, and all the points about providing for others, supporting the poor, etc. involve personal contributions, not political action.
Jesus teach importance of forgivenes but also realise there exist bad people. Luke 22:36 "Then said he unto them, But now, he that hath a purse, let him take it, and likewise his scrip: and he that hath no sword, let him sell his garment, and buy one."
On tax, Jesus was giving that response to an entraping question from Pharisees they asked because He had in past criticised of harsh tax policy. Force tithing is not a thing of New Testament but old.
https://biblehub.com/context/matthew/5-38.htm
https://biblehub.com/mark/12-17.htm