My boyfriends parents are being crazy?

My boyfriend who is 22 and I have been going out for 3 months now, he often stays the night during the week and goes to work from mine. He told me that he got 20-30 texts from his dad one night betweeen midnight and 3am saying "your a fking idiot, come home" "your mom can't sleep she's worried" "youre ruining your career". When he came home the next day his dad told him "your a fking idiot son" and hasn't spoken to him since. Apparently his mom was raging around the house. All this cos he slept a week night with me. I dont know why they react like this
My boyfriends parents are being crazy?
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