I'm suggesting that any group that limits itself accoring to race or gender is unaccecptable.
If these hacker groups are white only, then we need to break down the barriers that are keeping minorities and women out rather than starting new groups and self-segregating.
I wouldn't jump to the conclusion that the group is very exclusive. After all the women's hacker groups don't mind some men showing up, it's just that the focus is on catering to women. There's nothing wrong with small groups that pander to arbitrarily specific demographics, as long as the groups stay small.
If these hacker groups are white only, then we need to break down the barriers that are keeping minorities and women out rather than starting new groups and self-segregating.