By calling Rubio a RINO (a ridiculous accusation) you employed the
No True Scotsman Fallacy:
The coining of the term is attributed to professor Antony Flew, who gave an example of a Scotsman who in his 1975 book, Thinking About Thinking, wrote;
“Imagine Hamish McDonald, a Scotsman, sitting down with his Glasgow Morning Herald and seeing an article about how the "Brighton Sex Maniac Strikes Again". Hamish is shocked and declares that "No Scotsman would do such a thing". The next day he sits down to read his Glasgow Morning Herald again; and, this time, finds an article about an Aberdeen man whose brutal actions make the Brighton sex maniac seem almost gentlemanly. This fact shows that Hamish was wrong in his opinion, but is he going to admit this? Not likely. This time he says: "No true Scotsman would do such a thing".
Thus, when McDonald confronts evidence of a Scotsman doing even worse acts, his response is that "no true Scotsman would do such a thing." This denies membership in the group "Scotsman" to the criminal on the basis that the commission of a heinous crime is evidence for him not having been a Scotsman (or at least a "true" Scotsman) in the first place.
This reasoning is clearly fallacious, as there exists no premise in the definition of "Scotsman" which makes such acts impossible (or even unlikely).
No True Scotsman - RationalWiki