Inlaws acting weird

I’m a 24 female studying to get into law school and my fiancé is already a provider aka physician. He proposed to me. He made the announcement on social media first until I told him to tell them since it will be awkward if they find out somewhere else. He did. He told me his dad didn't say anything and his mom just said “be smart” and even suggested a prenup. I don't plan on keeping them close since apparently the dad doesn't like me bc I’m 10 years younger and don't have my law degree yet. Less than 12 hours the mom added me on Facebook and started spamming me with asian culture since they are asian. Then she texted my fiancee how even tho they don't agree with our marriage he should do a sit down dinner and announce it.

Are they weird?