Is the marriage between the parents still valid if the father committed some acts that are considered polytheism (shirk), believing they were to spread peace in the home, and he does not see himself as guilty?

It is forbidden to use amulets and practices aimed at corrupting relationships between people, especially between spouses, and it is forbidden to go to charlatans and sorcerers to have them made or undone. Whoever goes to them and believes them may commit an act of disbelief. Sincere repentance is obligatory for those who have committed these transgressions, and repentance erases what came before it.