As a lifelong atheist, I've noticed the resurgence in Anglo nations of religion, post 9/11, overwhelmingly from the US. Part of it is due to the grassroots movement in the US by conservative christians to dictate school curriculae, an explicit move started in the mid-80s that would be bearing fruit around the turn of the century, but mostly it seems to be a response and counter-response to that one terrorist attack. Whether it's people turning to religion for comfort, or people defending the religion of minorities to fight for their civil rights, religion has been back on the main card since 2001, whereas in the decade previously, secularism was only getting stronger.
Is religion much more in the mainstream now? From what I see, not much over the past 10-15 years, but definitely more than in the 90s. Trump isn't the only US politician to talk about God in speeches - in fact, you can usually tell whether or not a speech was performed by an American politician simply if it mentions god (and frequently!).
> Where I am from (New Zealand) a lot of Christians I have spoken with are appalled by Trump and don't buy into the whole "Gawd Bless Americuh" narrative
Outside of the US, fundamentalist christians are much thinner on the ground, though they are around.
> No political agenda can encapsulate who Jesus of Nazareth was and what he came to do.
The interaction of humans = politics. Even if all you want to do is heal the sick, that is your political agenda.