"Two truths theory. Did Buddha teach it?" (OP question)
“Truth is one and there is no second truth.” (Buddha, Sn 884)
So much for that "theory" then... well said, Buddha.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)
"To argue with a person who has renounced the use of reason is like administering medicine to the dead" - Thomas Paine