Meaning of refrain in 青空 by "The Blue Hearts"


The refrain of the Blue Hearts song 青空 starts like this:

生まれた所や皮膚や目の色でいったいこの僕の何がわかるというのだろう

While the first part is rather clear, I don't understand the second part.
What's the meaning of いったいこの僕？

Thanks!




いったい＝一体＝the hell, on earth

> 生まれた所や皮膚や目の色で、この僕の何がわかるというのだろう

=What do they know about me with only the information such as my nationality,
my skin color, or my eye color?

> 生まれた所や皮膚や目の色で、 **一体** この僕の何がわかるというのだろう

=What **_the hell_** do they know about me with only the information such as
my nationality, my skin color, or my eye color?




いったい＝一体＝the hell, on earth

> 生まれた所や皮膚や目の色で、この僕の何がわかるというのだろう

=What do they know about me with only the information such as my nationality,
my skin color, or my eye color?

> 生まれた所や皮膚や目の色で、 **一体** この僕の何がわかるというのだろう

=What **_the hell_** do they know about me with only the information such as
my nationality, my skin color, or my eye color?

