How does this disprove what I'm trying to say?
Everyone is in a protected class. Everyone. Even white male Christan Americans. Sure they are less likely to be discriminated against but it surely can and does happen. And lawsuits can and have been filed. There was one the other day here on HN, a company was accused of favoring SE Asians over Americans.
Also despite what crazy MRAs claim the courts have been working to correct gender imbalance that favor females. I can think of a couple off the top of my head - a case that involved male military spouses having to prove they were financially dependent on their spouse in order to receive military benefits and one that involved social security surviving widows getting survivors benefits but not widowers. Both were successfully argued and ruled unconstitutional.
Besides your logic makes absolutely no sense - "I'm going to discriminate against a protected class to avoid lawsuits accusing me of discriminating against a protected class."
If your logic holds, Google would actively not try to interview people at all, because Race, Origin, Gender, and Military Status are all protected classes with anti discrimination laws.