sicilian Bc4

I am a little confused in variation below:

After 3.Nf3 perhaps 3.-a6 is worth considering? It is often played in these variations and here it threatens b5, gaining a tempo on many variations. If white plays a4 to stop b5 the open Sicilians are not as good anymore, but probably still playable.

In the line you mention (1. e4 c5 2. Bc4 e6 3. Nf3) I like 3...d5, opening lines for the Bc8 and attacking the centre immediately.

2.  Bc4 is not bad, but it is not best.  In the line you give, the Bishop is still misplaced, subject to harassment and not putting maximum pressure on Black.  Black has a comfortable game and has equalized.  What more do you want as Black by move 5?

Black's position is probably fine. I have seen some nice wins in very similar looking IQP positions for black.