So it's ok to call your relative and ring them out over whatever likely minor role they had in the rollback of abortion protections, but we can't find fault in one of the most prominent members of the senate who's supposedly the figurehead of progressive politics in the US because he's essentially supporting a genocide?

If his legacy is that of popularizing more left wing views in the US, he's doing everything he can to destroy all of that and self immolate by supporting Israeli genocide. Even by your "realpolitik" perspective of some leftist endgame - one that he has absolutely no chance of reaching before he dies of old age no matter how nice he plays - you should be condemning him outright as well.