The brutal fact is that while your mother is likely IQ smart she is ego intellectually underdeveloped. In other words she is egocentric to the point at which she can only connect the dots of life as it affects her personal fears.
It has been demonstrated in many studies that when politicians like Trump (and media like Fox News) stir up fear, folks turn more conservative. One has to be pretty sophisticated to rise above this sort of primitive fear of the “other.” You on the other hand have grown beyond your mother and that can be a sorry cross to have to bear.