Had the Church not excommunicated him I don’t think his movement would’ve gained as much momentum as it did.
That’s debatable. Had the Church merely said “meh… you’re wrong; go sit down”, I think it’s not unreasonable to presume that Luther would have left on his own accord and started his own congregation anyway. Given that the forces that made the Reformation happen were largely political (i.e., over who rules and who controls financial resources), it would seem that Luther was just the spark for tinder that was just dying to catch fire – in other words, it would have happened anyway, even without an ‘excommunication’.
The sale of indulgences was absolutely wrong and immoral
The thing is, the Church itself didn’t advocate for the excesses; individuals did! So… why leave the institutional Church, if the issue is that individuals sin?
It is entirely foreseeable that they would not have been addressed.
The thing is, the reforms didn’t change doctrine. Moreover, the calls for reform predated Luther’s split with the Church. So, your claims seem implausible on two counts: first, the counter-reformation
re-affirmed the doctrinal teachings that Luther rejected, and second, the reforms that were adopted were meant to reinforce the Church’s ability to teach its doctrines properly.
Again, if you read the Augsburg Confession you will find a thoroughly apostolic confession of faith supported by the Early Church Fathers. Luther was catholic his entire life.
A couple of thoughts…
First, the Augsburg Confession, being, as it was, a defense of Luther’s positions to the emperor, really reads more like polemic than rule of faith.
Second, in the way that it’s written, it really
does leave much unsaid… and oddly enough, the ‘holes’ in the statements just
happen to be in places where Luther is downplaying differences between his theology and the Church’s. He’s ‘apostolic’ in what he says… but he leaves out other apostolic assertions that are at odds with his theology.
Finally, who says that the definition of ‘catholic’ is merely “apostolic + supported by ECFs”? There’s much good between 400AD and 1500AD – on whose authority may one simply jettison those teachings and practices of the Church in that time frame?
is a “competing religion” then that confirms the legitimacy of Luther’s doctrinal grievances and the need to proclaim the gospel.
Only if Luther’s claims were legitimate. If they aren’t, then they
are a novel innovation which competes with the lived experience of Christianity for 1500 years.