Politics is downstream of culture.
Much of culture is now spread through the internet.
Many who lean left are starting to understand the importance of the 2nd Amendment.
Those who have influence in the culture spread this new found understanding.
A couple of left-leaning influencers that come to mind are Tim Pool and JP Sears.
JP just dropped a video concerning his “awakening”.
https://youtu.be/7fKO1-hE2Wg