When I was a preteen on /pol/ there was a serious fetish for showing affection to your fellow posters, calling each other 'brother' and other cheesy shit. I thought when I was a stupid little fuck that these people really cared for me and wanted to know what I had to say, then I became a leftist and I never felt that again. I've never been part of any leftist community or project where I felt like people gave enough of a shit about me to forgive even a minor transgression. I feel similarly cold about these people who I am around. Its like in a heist movie where all the characters are brought together for a common goal and once they accomplish it they promise to never speak again. Anyone else feel this?
I'm really sorry to hear that that's been your experience, but I can at least personally attest that that's not universally true on the left. I was involved with tenant organizing in my town, and we started our meetings by checking in on everybody and developed a real sense of mutual trust and support. I think if you can't practice solidarity in your organizing, you're never going to reach a mass base; it's really that important.