What does it mean that God has a son? Isn't that a pagan concept?

What does it mean 

that 

God has a son? 

Isn't that a pagan concept?

One for Israel Ministry
https://www.youtube.com/watch?v=55MVA2BD0_M

Who is Yeshua?

http://jewishvoice.ca/who-is-yeshua/reasons-to-believe/

Steps to Peace with God - ( video version )

http://peacewithgod.jesus.net/

Steps to Peace with God - ( text version )

http://fishthe.net/steps/steps1.htm

Former Muslim Faisal Malick Testimony 
(Amazing encounter with God)

https://www.youtube.com/watch?v=wIXO902peIk

Connect with God

https://www.amazingmuslims.com/connect-with-god

Thank you for reading my blog.

God bless you.

Ron