The left calls their political opponents Nazis no matter what. The opposition is just that: opposition. It serves no purpose but to create a coalition intent on pushing you out of office. They will always fight against you, and in my opinion, it would be best to either ignore their hate and keep campaigning or calmly and logically state your opinion in an attempt, not to convince them to switch sides, as that is extremely unlikely, but rather to show undecided voters that you are capable of logical debate and reasoning out your opinion.