The percentage of people who care is miniscule. Even among the so called alt right, there are very few people that would not welcome someone with Jewish ancestry who actively speaks out against Jewish power, as evidenced by Eric Zemmour and Ron Unz's popularity in those circles. Zemmour never actually names Jews, but he does speak out against propaganda and pressure tactics widely acknowledged as being part of a Jewish campaign to ethnically cleanse whites from their European homelands. Unz on the other hand will openly name them.