Verb conjugation of "anstoßen" in German

My daugther was crying all night and we did not know why. We assume that she is getting into the terrible two age and wants to give us a hard time. We love her so much and do not get upset by that.
Regretably they are fighting at the wrong 'frontline'. They are fighting there because there they can win. Nothing gets solved though. One needs to tackle the real issues and not flee for political reasons.
We shared a cabin with an elderly couple from Spain. They started blablaing about Spain, about their corrupt government and about their civil war. They should not work in PR, advertisement or sales.