Religion does follow a belief structure that differs from logic but it sure as shit is a robust and resilent belief system.
Perhaps that’s true in a global sense, but that doesn’t mean Christianity is devoid of individuals who can clearly and logically defend their position in debate against secularists and atheists. William Lane Craig comes to mind, among several others. You might not like listening to him, but he certainly doesn’t rest his case on an assumed moral authority or any other fallacious logical grounds.
What matters is whether it’s objectively true. Christians may be failing in certain ways at evangelism, but as scripture says, “The natural man does not understand the things of God, because they are spiritually discerned.”
Most I know come up with their own version of religion based on christianity - picking up what they like, ignoring rest. Which is a sane and fine solution and practically transition to agnosticism over few generations, but it sure ain't the same christianity branch they claim to adhere to.
It could be still adding numbers due to remote missionaries wiping out local religions and overall increasing numbers (I sure as hell hope not), but I can't imagine this trend in western democracies. Immigration you mention should be 0-sum game - yes more immigrants in their new home country go into church, but they left their home country.
Other religions, especially islam might be another story.
1) http://elm.washcoll.edu/index.php/2018/11/fastest-growing-re...
Christianity’s main claims revolve around agreeing eyewitness accounts from hundreds of people, set against a backdrop of people in power who had the motivation and opportunity to disprove them if they could (but who opted to kill them instead). You may say those people were lying or call them delusional, but my choice to believe them hardly qualifies as magical thinking.
And that could easily be lobbed the other direction. To think that a universe, its physical laws, and everything in it can come from nothing might just as well be called magical thinking.
It might be more helpful to engage the worldview and its arguments than use dismissive phrases.
As we all know, many people are effin' properly weird. They make up stories, believe utter nonsense only because its convenient. But we're led to accept without any question records passed verbally for hundred(s) of years of magical supernatural acts. In fact, whole bible is full of them, somehow universe 2000-3000 years ago was much more magical place where simple laws of physics didn't work if you had the right god on your side.
Here we come full circle to the fact that most sane christians today don't have answer to this simple logical fallacy (and others). They will tell you that you can't take these things literally, just take the moral values etc. So we end up with some bastardized religion, call it a sect, which picks from Bible what they like, and conveniently ignore the rest.
With this logic we can turn to old greek/persian/hindu/pagan/etc myths which contain tons of moral lessons too. And being a good moral person doesn't need any fear-of-god pressure, most of us have this thing called moral compass. Those who don't have it can't be saved/turned good by any faith anyway.
Maybe some older folks from bible belt or some 3rd world country can be still fed this utter nonsense, but anybody with critical thinking has hard time with these topics. You can't be a good citizen and be critical to your government and overall bullshit around us, and in the same time turn this part of your personality off with faith.