Brutus: Shall Rome stand under one mans awe? What,Rome My ancestors… thou receivest thy full petition at the hand of Brutus! (2.1.132)Is this…

Brutus: Shall Rome stand under one mans awe? What,Rome My ancestors… thou receivest thy full petition at the hand of Brutus! (2.1.132)Is this…

Brutus: Shall Rome stand under one mans awe? What,Rome My ancestors… thou receivest thy full petition at the hand of Brutus! (2.1.132)Is this…

Brutus: Shall Rome stand under one mans awe? What,Rome My ancestors… thou receivest thy full petition at the hand of Brutus! (2.1.132)Is this…

Yes, this is exactly what Brutus is saying, at least in the first part of the lines you cite.The first few lines here are saying that Roman history shows that Romans do not like kings.  They want to be republicans.  Brutus points out that his ancestors got rid of Tarquin when he tried to become king.The last lines, though, are on something of a different subject.  He is building on what he’s said before.  He is promising that he will not let Rome down — that he will give Rome justice (by opposing Caesar).
Brutus: Shall Rome stand under one mans awe? What,Rome My ancestors… thou receivest thy full petition at the hand of Brutus! (2.1.132)Is this…