American attitudes towards Texas were very much in keeping with the idea of manifest destiny.  First, the attitudes of American settlers in Texas towards the Mexican government showed the idea of manifest destiny.  These settlers did not want to become Catholic or obey the Mexican government because they felt that their religion and their American ways were superior.  Second, when Texas became an issue between the US and Mexico in the 1840s, the US position showed the feeling that the US somehow deserved to have Texas more than Mexico did.  The feeling of American superiority and the feeling that the US deserved to expand were both aspects of manifest destiny.