Answer :
Author clearly shows his actual attitude towards war in general - war is horror and harm that he will never support even if he will be offered a subject of wealth for that. The war is a big crime, it is a fight of several sides. All of them can be consedered murdereres, but there is a possibility that they want justice : to put an end to robbery, protect a country from invadors that want grab a territory which does not belong to them and to reach peace. Paine shows, that world is not perfect and if some force tries to harm his country, that leads to the war - it is his sort of duty to support it, so I choose have righteous reasons to justify supporting the war.