You are correct. The far left do not represent majority opinion. Nor though do the far right.
However, it isn’t the far left protesting what ICE are doing. I heard it described today as much more like a neighbourhood watch activity. A group of concerned citizens observing things in their locality that disturb them. Things that appear to be illegal, perpetrated by a masked para military force not wearing ID. With their trusted local law enforcement being excluded from investigating they have decided to collect the evidence on their phones.
Trump has been very successful in harnessing the power of today’s technology to reach the people directly, thus being able to spread so much misinformation. Now that is being used to upend him.