U.S. abolitionist activities did not contribute to hostilities with Mexico.
Step-by-step explanation:
U.S. abolitionist activities were a part of a long winded struggle against slavery that was rampant in the south for a long time in US but it had very little to do with the power across the border where such practices were also carried out rampantly.
The Mexican powers were more interested in the states that US had taken over from them specially California with its strategic position and Texas a s a result of a long winded and bloody war and defeat of the Mexicans.