Job discontinuation due to FMLA use

I have been working at the same company for 23 years with an exemplary record and evaluations. Since I began using intermittent FMLA, however, things have changed. I have been harassed by coworkers, subordinates, my boss, and HR due to this used. HR even told me that if he could he would fire me but it was against the law. My position is state certified and law requires me to have a four year degree. I recently found out that under the guise of a complete evaluation, HR and my boss intend to decertify my department and discontinue my position. Currently, he has me collecting data to prove this would save money, but my investigating has found this to be the opposite. First, can his discontinuation of my position be linked to all the documentation I have of his FMLA harassment? Also, can the position be discontinued and then another person hired and the position reinstated? Thank you