Label Republicans as RINOs

A fellow Republican fairly and rightfully criticizes you? Call them a RINO (Republican in Name Only) so that your followers will think they are not to be trusted. As "No True Republican" would say or do what they did.

Propaganda Tactics Used

Discredit Conservatives Deemed Insufficiently Loyal
When you call someone a "Republican in Name Only", you are saying that they should not be trusted to act in the Republican party's best interests. And so whoever you target are thus more inclined to disbelieve criticisms against you by Republicans you label as "RINOs".
Use Catchphrases
RINO is simply to say and easy to understand: Republican in Name Only. It's quite an effective way to quickly and easily smear an opponent.
Repetition Repetition Repetition
It is so commonly used now by the right in efforts to appear more conservative than their fellow Republicans in order to win fundraise and win primaries, you may forget that the left also has the comparable "DINO" (which is used far less and usually accurately for instances when Democrats do actually lean a lot more conservative than their constituents).