Third party candidates don’t typically siphon votes away from the party that religiously tows the line.
Trump doesn’t really tow the line, through. He’s a manifestation of a revolt from inside the GOP’s white nationalist electoral core, against the financial internationalist who have controlled the party since Reagan.
I don’t think it’s clear who RFK is really feeding from. It’s possible his voters simply wouldn’t turn out if he wasn’t on the ballot. But it’s doubtful that he can steal Biden voters by parroting Trump positions.
The dems and the left will debate procedural shit for how to accomplish similar goals. The right is all emotional appeals/reactionaries.
Liberal admins don’t debate procedural shit, they kill legislation hostile to their donors with technicalities. These same technicalities never affect our illegal wars or unconstitutional policing or criminally unconscionable polluting or corrupt corporate bailouts.
The big difference between libs and cons is that cons demand their red meat and are willing to lose an election or two to guarantee it, while liberals are constantly running scared of their replacements in the next election.
The emotion you see isn’t unique to conservatives. It’s simply rewarded rather than shamed.