The ACLU basically only defends Christians when it serves their agenda, and the cases they take on are “easy”, those that will not have any lasting legal precedent that will benefit Christians. There are numerous examples where the ACLU has been on the forefront of silencing, or attempting to silence, Christians. One being the recent one with suing a 70-Year-Old Christian for refusing to participate in a longtime client's same-sex wedding, even after she referred him to other florists, which is a direct violation of our first amendment right of freedom of religion and not prohibiting the free exercise thereof. If you need more examples just look it up.
The ACLU basically only defends people who are being discriminated against by other groups to serve their own agendas, and they don't have the goal of legally benefiting any group over another. There are numerous examples where the ACLU has been on the forefront of defending the religious and other freedoms of all religious or otherwise groups. One being the recent one with suing a 70 year old bigot who just so happened to be Christian but was not targeted on their religion for refusing to participate in the loving union of marriage of a loyal customer when he would do it for a strait couple and give them the same product, even going so far as to kick them out and tell them they have to go to a different florist, which is a direct violation of the ruling that separate but equal is unconstitutional. If you need more examples just look it up.
Christianity is a very hateful religion. It's followers pass laws that take away the rights of Gay people, and they do this claiming it is protected under there "Religious freedom". The reason the ACLU never defends christians is because they don't need defending. They are the ones that are doing the discriminating
The ACLU is responsible for Civil Rights violations, that is their thing. When a party, namely Christians in this situation, decide that they want to discriminate as their holy book decrees, then that crosses a line that the First Amendment does not cover. You are violating another person's right to not follow your religion. If a Muslim for example, refused to serve you because you are an infidel according to Islam, you would be throwing a fit. It is not the ACLU's job to help Christians maintain their majority.