Do you know what RC’s thoughts are on this? I was floored when I heard this radio sermon, but I’m not sure I heard the whole thing, and not totally sure I interpreted it correctly.
On the radio, you don't always have time to think through every angle like when writing. The radio comes off kind of like a rough draft of an oped.
My guess is (or maybe my hope since I esteem Dr. Sproul) is that he would agree that Christians should be standing up to government. Obey yes unless it conflicts with Christian thinking. But be quiet while injustice occurs - never.