And in this case it can become a tangent, while the lost head to Hell and while we need more holiness, and thus not be ashamed at His coming. And He is.
You present a good point. Normally I would agree with you that arguing prophetic matters becomes futile for fellow brothers and sisters in Christ. However we normally discuss points we all agree are mostly or all future and agree not to be dogmatic about it given we cannot be certain on some matters. When those who point out most if not all prophecy to include the second coming of Christ and the first resurrection are now past, I see such claims as being dogmatic and thus must be refuted.
As I stated in similar threads when it comes to eschatology we can as brothers and sisters agree to disagree and break bread together. All futurists, historisists post millennial, pre millennial, and even partial prederists adhere to a literal yet to come second coming of Jesus Christ. The OP asserted the second coming and first resurrection is in time past. I truly believe that is error and have kept my comments focused on Revelation 19 and 20.