I've had this experience around 2000. I supported the invasion of Iraq but I defended those who opposed it. I just kind of thought it was healthy for people to disagree with going to war with another country. One of my 'conservative' coworkers who was a soldier during the korean war thought that people shouldn't disagree with their government when it goes to war but I explained that disagreement might be good for good decision making within a democracy. One of my 'liberal' coworkers, of course, jumped on that and seem to be on my side until I mentioned I liked watching the Rush Limbaugh show. It was at that point I became his enemy all because I said I liked watching his show.
I don't know if any other liberal or independent might have had any similar experiences dealing with the left? The minute you disagree with the left on anything you immediately get labeled as a conservative.
One data point is, well one data point. Living in the Bay Area. diverse in many ways including political thinking, I've found a great deal of debate on the issues which divide people, using taxonomy limited to left and right is not helpful or properly descriptive.
Using left and right to describe a person in the manner used today are simply shortcuts, and used primarily as pejoratives; even liberal and conservative no longer hold much value other than to demean one side or the other.
If we are to look to the original use of left and right, used to describe the French Government after their revolution, we would find the Right Wing supported the Power Elite, and the Left Wing supported the masses. Today the balance of power is upset, unless those who seek to become leaders do not understand that business needs labor and labor needs buisness we are doomed to remain a house divided.