Synonyms for Tear up:

n.

upset, dismay, depress, worry, stab, disturb, wound, hang over, distress. destroy, eat away, devastate, ruin, vandalize, shatter, obliterate, ravage, mutilate, trash. wail, choke up, dissolve into, burst out, howl, cry/sob your heart out, cry, weep. resist, object, go against, declare against, reject, rebel, stand against, have/have got against, oppose. tear up (noun)
shred, rip up.

v.

raze (verb)
obliterate, destroy, upset, ruin.
wreck (verb)
shatter, ravage, trash, vandalize, devastate.

Other synonyms:

declare against. oppose, go against, stand against, resist. rebel, object. reject. Other relevant words:
vandalize.