It's silly to pretend there's any difference between right-wing 501c4s and left-wing 501c4s.
Actually there is.
A couple of hot girls walk up to a night club and encounter the bouncer. One is dressed in red, the other in blue. They both show their ID and prove they're over 21. He lets the girl in the blue proceed, but he stops the girl in the red. He proceeds to scrutinize her. He asks, "how tall are you?"
"What?" She replies. "Answer or you don't get in" he explains. "5 foot 6 inches, sir; but what does the have to do with my getting in? You didn't ask the other girl--"
"Just answer a few more questions and I'll let you in" he retorted. The girl in red sighs but ultimately consents. "What is your shirt size?" "A 6, sir" she answered. "But what does the have to do with anything? I just want to have a good time like the rest of those people in there!"
The bouncer proceeds to further scrutinize her, "What shoe size are you?" The girl by now has been standing there for 15 minutes, thinking to herself "This isn't fair!"
"A 7, sir but I--" The Bouncer interrupts once more. "A couple more questions. What High School did you graduate from?" The girl by now is a bit distraught, but she answers "Gallant River High."
"Okay, last question, young lady. What color panties are you wearing?" Shocked and appalled by this question she rips the Bouncer. "That is none of your business! This has nothing to do with me getting into the club! The girl in blue was never asked any of these questions, why was I stopped?"
"Orders from the top, ma'am. The owner of this establishment's favorite color is blue, he asked me to question anyone who isn't dressed in the same color." "THAT'S DISCRIMINATION!" She protests. The girl in red ultimately storms off back to her car, to wait for her companion's return.
All of this scrutiny, because she wore a different color to the party.