I concur.
The truth the left hates is that Christianity inspired and informed Western Civilization: philosophy, literature, painting, music, and science.
The Hannibal-like elephant in the European living room is that over 400 years of Muslim invasions are primarily responsible for the Dark Ages, not Christianity.
The current situation philosophically is the result of the successful century-long usurpation of public education by the Frankfurt School.
I now include private education, including seminaries - starting with Fuller Theological. They are heresy factories promulgating human hubris, not humility. I have met too many heretical seminarians in my life to think otherwise.
Further, so-called Christian colleges and universities are now adopting communist propaganda on illegal aliens, environmental issues, and homoerotic lifestyles. They are veritably tripping over themselves to seem modern (read: leftist).
finally, so-called Christian charities are almost all Marxist organizations aimed at destroying America from within by flooding it with aliens who reject Western Civilization.
More even than the Frankfurt school, Christianity was weakened by sectarian divisions, its difficulty in reconciling faith with modern science, and its inability to restrain mankind's tendency toward increasingly destructive wars.
Of course, the great wars of the 20th Century were not religious wars but wars spurred by the ideologies of Nazism and Communism. Mankind's accomplishments in the fields of science and technology have brought not just a better life in a material sense but also a new potency to our destructive impulses.
You are sadly correct about most Christian colleges and charities. They have embraced the supposed Christian social gospel to the point of jettisoning Christianity itself. Most social gospel adherents though do not realize that its teaching makes little sense except as an adjunct to genuine Christian faith. Ominously, under Pope Francis, the Vatican seems to now be more of social gospel belief than Catholicism. It is harder than ever to discern any near term hope for a Christian revival.