Wesley Hill puts it well:
I’ve come to think the reason Gamaliel, Jesus-disbeliever though he apparently was, gets quoted in the book of Acts is that his rationale was commendable. We believers in Jesus, too, have to wait for Judgment Day for God to sort out the wheat from the tares — for God to sift through the ways I and my tribe, “traditionalists” on sexuality, have been more Levite than Samaritan to gay people left for dead along the church’s highway to supposed triumph. We have to wait for God to expose the ways a supposedly enlightened “progressivism” has left believers bereft of any way of understanding Scripture as the Word of God for people today and therefore constantly exposed to whatever wind seems to be promising compassion in the here and now, often heedless of its hidden costs. We have to wait, ultimately, for God to bring us all, traditionalist and progressive alike, to see our shared poverty, our common need for God’s mercy in Christ. In the meantime, and in spite of spirited urges for mutual anathemas, we’re apparently called to “wait for one another” (1 Corinthians 11:33). We’re called to wait as long as it takes to maintain our visible unity, our line of direct descent from those who experienced Jesus’ transforming mercy firsthand.