100% but g4 is better to "pushed" it.
Grob spares no one
I don't agree.1.g4 and black plays d5 to attack your pawn,you defend it and black plays c5 to get a strong queenside while white has a trash kingside.unlike b4 in which white can plays 2.Bb2 to counterattack.
No 2. Bg2 if black ×Bg4 i play c4
Это то же самое, что и "b4 e5 Bb2 Bxb4 f4".
team, to post in this forum