Primarily, yes. We are animals and the fear instinct is powerfully ingrained in animals to help us survive. Both as individuals and as a species. So the primitive parts of our brains have a tendency to take over whenever there is a threat of any kind. And when presented with anything different, collectively we have the tendency to respond with condemnation, which is anger (which is fear). We can even become fearful of our own selves, turning upon ourselves.
My belief is that there are really only two emotions, fear and love. I believe in the existence of love though I think it is rare.