Merriam-Webster: "the spreading of ideas, information, or rumor for the purpose of helping or injuring an institution, a cause, or a person" and "ideas, facts, or allegations spread deliberately to further one's cause or to damage an opposing cause" [1]
Cambridge Dictionary: "information, ideas, opinions, or images, often only giving one part of an argument, that are broadcast, published, or in some other way spread with the intention of influencing people's opinions" [2]
Wikipedia (quoting Encyclopedia Britannica): "Propaganda is communication that is primarily used to influence or persuade an audience to further an agenda, which may not be objective and may be selectively presenting facts to encourage a particular synthesis or perception, or using loaded language to produce an emotional rather than a rational response to the information that is being presented." [3]
Wikipedia further quotes NATO's 2011 guidance for military public affairs definition: "information, ideas, doctrines, or special appeals disseminated to influence the opinion, emotions, attitudes, or behaviour of any specified group in order to benefit the sponsor, either directly or indirectly" [4]
I that OP's use of the word is well in line with each of those definitions.
[1] https://www.merriam-webster.com/dictionary/propaganda
[2] https://dictionary.cambridge.org/dictionary/english/propagan...
Truth needs to be put in context. Truth needs to be interpreted. There is no such thing as objective truth.
Effective propaganda is like a filter that is everywhere you look. You don't know it's there because you never see the world without it.