the only identities who have been truly practicing identity politics are christians and caucasians

Identity politics are about setting my own cultural group as a priority above others. African Americans ahead of everyone else, or gays ahead of everyone else, or Buddhists ahead of everyone else: if those happened, that would be identity politics. The very fact that all these "identity politics" groups have so readily formed inclusive coalitions with each other puts the lie to the whole label. No, there are only two identity groups who have actively been trying on a large scale to promote themselves above other groups in an exclusive and nonsharing way, and those two identities mostly overlap: Christian evangelicals and white conservatives.

Once again, we've let conservative projection frame our discussion. Equality, fairness, justice, and civil rights are not identity politics. Opposing these things in favor of white Christians -- that is identity politics.