Most social media posts of a political nature telegraph gripes, sniping, trolling, rage, disbelief and righteous indignation. Little of it promotes our core liberal beliefs. These social media posts are not a productive use of our time.
Remember that many if not most people are not as politically aware as you. They may have bought into the simple frames and messages offered up by conservative strategists (by design) or are unaware of fundamental messages obscured the mainstream media (by neglect and mediocrity).
Social Media offers the opportunity to offer a new perspective that reinforces our worldview.
In fact I’m regularly surprised, when I frame an issue from liberal values, that the response, even on the right, is a puzzled look and a statement along the lines of “Gee, I never thought of it that way”. An “Aha” moment. Framing properly almost always opens a conversation with people who may disagree with you —griping only encourages polarization.
If you are political on your social media, think of your friends and subscriber list as your own personal walk sheet. These are people who have chosen to hear your thoughts. (Many may even respect those thoughts!) These are people you can persuade—maybe not with one post, but if your posts are well framed and thoughtful, you will certainly move them over time.