The idea that many paths can lead to God doesn’t bode well for truth. When truth is in short supply there are plenty of distortions around & that doesn’t bode well for society.
A multi faith multi marriage scenario may present as pretty colourful & creative as far as humans go but mix it all together & you get a black goopy fluid where all the colours are individually lost in this dont worry, be happy forget about the truth, who needs it anyway world.
What was primary becomes secondary & so on & in it all traces of pure colour become forgotten like a thought unable to find grip. Tonally dark & lacking the light of truth we stumble around. Welcome to the land of Danse Macabre. Here we are all united together in momentary death....then it is on to eternity while traces of our life are left behind on the fading & crumbling planet. Heb 1:10-12.