Should I move to another country when my parents don't want to move with me?

I am a 26 Male and I live in a country where I want to speak up against the oppression around me but I fear that if I do, mine and my loved ones lives would be endangered. Therefore, I want to move to a different country and then marry and settle there at least until things get better in my home country. But my parents don't want to come along with me and leave our home country. They even don't like the idea of me moving abroad myself. I have one brother who is about the same age as me and also unmarried and we stay with our parents. My parents don't get along well with eachother and therefore often want to keep the two of us around so as to maintain a homely feeling in a not-so-good marriage. Now my question, is it fine for me to move abroad and then work towards a greater cause of fighting oppression and fixing things while sitting in a country where if I speak up, I couldn't be threatened or kidnapped? Or should I stay with my parents so that they're pleased with me, but at the cost of keeping my head down and not speaking up against all the injustice around me? One thing I haven't figured out is that if I move abroad and my parents or brother are still here, there is also an off chance that when they can't reach me, they could possibly use my family here as bait or compensation, and I fear that too.