You called them a liar because they said they were too tired to continue the discussion. It's literally what you said

You did go low like that, though

From your profile:

One word from Chairman Mao is worth ten thousand from others. His every statement is truth. We must carry out those we that understand as well as those we don't.

Mao:

Whatever is written in a book is right — such is still the mentality of culturally backward Chinese peasants. Strangely enough, within the Communist Party there are also people who always say in a discussion, "Show me where it's written in the book." When we say that a directive of a higher organ of leadership is correct, that is not just because it comes from "a higher organ of leadership" but because its contents conform with both the objective and subjective circumstances of the struggle and meet its requirements. It is quite wrong to take a formalistic attitude and blindly [sic] carry out directives without discussing and examining them in the light of actual conditions simply because they come from a higher organ. It is the mischief done by this formalism which explains why the line and tactics of the Party do not take deeper root among the masses. To carry out a directive of a higher organ blindly, and seemingly without any disagreement, is not really to carry it out but is the most artful way of opposing or sabotaging it.

¯\_(ツ)_/¯ even Mao would have had a problem with you