What doctrine are you referencing, specifically?
Nostra aetate. I've been on the forums for a while but this is my first time digging through this subsection (largely because Vatican II research is causing a bit of a crisis for me and my wife). Please link or respond with any good commentary on it, here or elsewhere. It's appreciated.
I've seen nostra aetate manifest in ceremonies with other religions, statements about how we shouldn't convert Jews because the Old Covenant is eternal, etc. There is certainly non-Catholic behavior that overlaps with Catholic teaching (e.g. helping the poor) and to the extent it does overlap it should be praised, but the post-VCII Church makes no effort to lead others towards the true path, or even say publicly to those with other beliefs that there is a true path. Is this Vatican II itself, the implementation of it, or did Vatican II just open the doors for these "everything is equal" beliefs to take root?
Anecdotally, after confirmation, I started attending Mass in Europe where I was living at the time. The walk to the church took me past a location where groups of homeless and heroin addicts always huddled. It was impossible to miss for anyone going to the church. The "welcome packet" I received from the Church in the mail a few days later was a donation packet for Syrian Muslim refugees coming to Germany, along with how to make sure church tax was deducted from my paychecks. It always struck me as mirroring the secular/globohomo approach -- neglecting your neighbors in front of you and ultimately harming them, in order to save face with non-believers.