[Chris2048]

free speech gives you certain right to say what you want to say, and express your opinion. It even lets you give your opinion on other peoples opinions.

It doesn't allow you to state as fact that someone holds an opinion that they do not. You can express an opinion, but there are limits on stating falsehoods, especially wrt other people.

you say "encounter an opinion they happen to disagree with", implying your statement about the memo is just your opinion, but you didn't say it in any way that suggests it was that subjective; and, making any unsubstantiated claim about a person is on shaky ground even if you did make it clear it was just opinion.