This is how I see it:
In the Bible, "rebuke" signifies a strong expression of disapproval or criticism, often used to correct or reprove someone for wrong behavior or actions, aiming to bring about repentance or change.
In a biblical context, "mock" signifies treating someone or something with scorn, contempt, or ridicule, often involving disrespect or dismissal, and is frequently associated with unbelief, pride, and rebellion against God
To my thinking, one can only support Communism if one is evil, or one is stupid. If I were a Communist, I would hope people would tell me this directly, so that I could repent. To my thinking, this would be love, whilst saying nothing would actually be hate. And if done in a humorous way, all the better for accepting painful truths, eh? ;-)
For those who sincerely believe their Communism can coexist with Christianity without being evil or foolish, this is between them and God. Note Proverbs 1, where Wisdom laughs at and mocks those who wouldn't heed her rebuke. Elijah also mocked the priests of Baal. But nice to have some discussion thrown in.
Proverbs 1:20 - 33
Wisdom crieth without; she uttereth her voice in the streets:
She crieth in the chief place of concourse, in the openings of the gates: in the city she uttereth her words, saying,
How long, ye simple ones, will ye love simplicity? and the scorners delight in their scorning, and fools hate knowledge?
Turn you at my reproof: behold, I will pour out my spirit unto you, I will make known my words unto you.
Because I have called, and ye refused; I have stretched out my hand, and no man regarded;
But ye have set at nought all my counsel, and would none of my reproof:
I also will laugh at your calamity; I will mock when your fear cometh;
When your fear cometh as desolation, and your destruction cometh as a whirlwind; when distress and anguish cometh upon you.
Then shall they call upon me, but I will not answer; they shall seek me early, but they shall not find me:
For that they hated knowledge, and did not choose the fear of the Lord:
They would none of my counsel: they despised all my reproof.
Therefore shall they eat of the fruit of their own way, and be filled with their own devices.
For the turning away of the simple shall slay them, and the prosperity of fools shall destroy them.
But whoso hearkeneth unto me shall dwell safely, and shall be quiet from fear of evil.