I am probably one of the more left-wing people here, but I have to point out that Democrats have a similar routine - they point to polls that ask about issues stripped of party identification, which reveal that many people who identify as Republican agree with the Democrats more than they do the Republicans, but powerful moneyed interests are manipulating the people into voting against their true beliefs.

Naturally, identifying a superficial similarity between the arguments of two opposing parties is not enough to conclude that both arguments are false; each must be weighed on its own merits.