Typical tactics, but I'll respond.
I will accept as my Brother any one who believes The Gospel. If their theology denies the deity of Jesus Christ I will seek to convert them. If their theology holds that there are several paths to salvation I will try to convert them. In the course of conversations on these threads if a Jewish poster offered insights I agreed with, or a Noahicide, I may align with them during that conversation that doesn't mean we are in lock step on all things.
At first blush one would think RC's would be my brethren, but when you discover the RCC rejects The Gospel by adding "maybe", "and",or "but" to it a huge gulf opens between us. So the question I throw back is what's worse the person who aligns with a group of Evangelicals but makes it clear they have some different beliefs, or the one who claims to be the same but isn't?
What if their theology says you are violating the commandments by celebrating the Lord’s Day on Sunday?
Cool, so you then say that Unitarians are Protestants?