The person you're arguing with made the point that if you hold the ones who voted against the bad thing happening as partly responsible, by the same logic, you should hold people who voted for Clinton in 2016 partly responsible for the election of Trump.
I don't think you can have it both ways. Either the entire USA including you is responsible for Trump becoming president and the entire SCOTUS is responsible for today's ruling, or you're not responsible for Trump winning and the three dissenters are also not responsible for today's ruling.
I get that you're angry, and it's a good day to be angry, the day that they ended democracy, but maybe be more selective about who you're angry with and sometimes try to check if maybe there are some valid things people can disagree with you about.