Your parents remind me of a former colleague who completely changed his political views after frequently listening to AM talk radio every time he drove between Goldstone and LA. Many of us (me included) are like a "sponge", we take on characteristics of those we surround ourselves with (virtually or in real life). I try (and I don’t always succeed) to associate myself with individuals that I admire and possess characteristics worthy of emulation. I have to be careful and have the discipline to avoid those with characteristics that I don’t want to unconsciously assume.
Most people are sponges in that way. There's a say that 'you are the average of the 5 people you are closest with'. Birds of a feather do in fact flock together.