I believe that Christianity or rather Jesus brought us to God and worship Him as Father in Heaven. Am I right?

I have told friends that the difference in Christianity and other faiths is that Jesus teaches us to worship God and call him our Heavenly Father. The Bible OT suggests that God is the God of Abraham, Issac and Jacob. If they being their ancestors then God must be our great great Grand Father. Yet God the Father wants us to believe He is our Abba Father. How strange but wonderful. Jesus made remark that in heaven, relationship is equalled except they are some who are elders (check with the book of Revelation). Therefore tell me whether it is true that Christianity teaches God is our Abba Father and none other faiths have done anything that way. Well, the Chinese has the traditional faith to worship God as their Grand father or Tian Gong. They have even given a special day to worship Him as such i.e. on the 9th day of the Chinese New Year celebration. Maybe there is other revelation of God to be worshiped as Heavenly Father in other original faiths of any ethnic group.