Why do all these bridges seem to be one way bridges?

They lead to the promotion of Islam, because it will be the religion that will for a time exercise control over the Antichrist in the tribulation. Revelation 17:7 - "And the angel said unto me, Wherefore didst thou marvel? I will tell thee the mystery of the woman, and of the beast that carrieth her, which hath the seven heads and ten horns." The "beast" in this scripture is the one world government, over which the Antichrist will be the head (Rev. 13:1; 3 - "And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having SEVEN HEADS and TEN HORNS, and upon his horns ten crowns, and upon his heads the name of blasphemy. And I saw one of his heads as it were wounded to death; and his deadly wound was healed: and all the world wondered after the beast.") In summary, I believe Islam will be the One World Religion during the tribulation, and I believe the following scripture supports this - Rev. 20:4 - "And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were BEHEADED for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years." There's only one religion that beheads people today, and that is Islam. God bless!!!