Everyone has 1 vote. The influence of that 1 vote on your life is probably smaller than that of an affectionate relationship with that relative. Imo political confrontations are better kept for the street/pub/doorstep. The unspoken agreement not to touch on the topic must come from both sides though.
There are 2 types of people. Those who engage with politics and use it to bend the world to their will. And those who are ignorant of politics who get taken advantage of by those who are engaged.