There's hardly any difference between my viewpoint and migkillertwo's on this, he sees no evidence for 4199 of the world's religions, I see no evidence for all 4200.
For the record, I don't believe in any of these gods either:
Aa, Aakash, A'akuluujjusi, Aatxe, Aba, Abaangui, Ababinili, Abaçaí, Abad, Aba-Inka, Abal, Abandinus, Abarbarea, Abarimon, Abaris, Abarta, Abas, Abassi, Abba, Abdals, Abeguar, Abeguwo, Abellio, Abere, Aberewa, Abhean, Abhijit, Abnoba, Abuk, Abundantia, Abyang-Diriinin, Abydos, Acacallis, Acacia, Academus, Acan/Ah-Chuy-Kak/Ah-Ciliz, Acantha, Acarnan, Acaste, Acat, Acauã, Acca-Larentia, Acestes, Achachila, Achaeus, Achall, Achaman, Achates, Achelois/-us, Acheron, Achimi, Achiyalatopa, Achtan, Achtland, Acidalia, Acis, Aclla, Acmon, Acoetes, Acolmiztli, Acolnahuacatl/Acolmiztli, Actaea, Acuecucyoticihuati, Açuti, Ac-Yanto, Acyutah, Adachigahara, Adad, Adamanthea, Adaox, Adapa, Adaro, Adawulcanak, Addanc/Affanc, Adekagagwaa, Adeona, Adephagia, Adhidevata, Adim, Adi-Mailagu, Adimurti, Aditi, Adityas, Adjassou-Linguetor, Adjinakou, Adlet, Adlivun, Admete, Admetus, Adonis... omits several screens... Yosho, yoyolche, Yu, Yuanzhi-Tianzun, Yudhisthira, Yuga, Yu-huang, Yu-huang-Shang-di, Yuhwa, Yuki-Onna, Yum-Caax, Yum-Kimil, Yu-qiang, Yu-ren, Yushã-Kuru, Yuuk, Zababa, Zac-Cimi, Zagreus, ZakaMede, Zakar, aliaakis, Zalmoxis/Gebeleïzis, Zam, Zam-Armartay, Zanahary, Zao-Gongen, Zao-jun, Zappu, Zaqar, Zaramama, Zaria, Zarpanit, Zduhac, Zebris, Zelus, Zeme, Zemepatis, Zemes-mate, Zemininkas, emyna, Zenenet, Zenmyo, Zephyrus, Zethus, Zeus, Zeuxo, Zezengorri, Zhang-Fei, Zhang-Guo-lao, Zhang-Xian, Zhi-ni, Zhi-Song-zi, Zhong-kui, Zhong-Li-quan, Zhu-Rong, Zhu-yi, Zibelthiurdos/Zbelsurdos/Zibelthurdos, Ziburinis, Zinsi, Zinsu, Zipacna, Zirnitra, Zislbog, iva, Zi-yu, Zlota-Baba, Zocho, Zorya, Zotz, Zuberoa, zuijin, Zumbi, Zurvan, Zvaigzdes, Zvaigzdikis, Zvoruna and Zywie