If you repeat a lie, believing it to be true, it may not be perjury, but it is still a lie.
I remember a set of lines from the old Kung Fu TV show.
“The Chang Family are traitors.”
“ That is false, The Chang’s are loyal.”
“The Emperor’s edict has made it true, they are traitors.”
Today:
“Trump is a traitor.”
“No, he is a true American, a patriot.”
“Garland and the DoJ has said he is a traitor so it must be true.”