Is OTHER wrong in the post ? POST : My Mom has always critized my posts on Facebook for being immature and embarrassing for other family to see. I was 13 when I first opened my account so I guess good on my parents for preventing me from posting potentially cringy stuff, but I eventually stopped using social media entirely because I was afraid how judgemental my parents were. To be clear, I am thankful of my parents here, I don't want to paint them in a bad light for doing this.

I'm 21 now and started to use Facebook again because it's good to keep in touch with friends and I think a lot has happened in my life worth sharing and I also started to care less what other people think of me.

I thought an April fools Jon made by Elon Musk in his tweet was pretty funny. His tweet went something like this:
"First person who comments gets a free Tesla"

First comment by Elon musk himself: "April Fools!"

Pretty sure most Reddit users who were active yesterday know what I'm referencing. I decided to do pretty much the same thing on Facebook saying I was going to give away my gaming laptop to the first comment, and the first comment was me saying "April Fools". My friends and girlfriend thought it was funny in their reacts and comments to my post; but then I get this message by my Mom in the morning:

"
Anon sweetheart I love you and miss you very much 
I know April fools day is your favorite time to do jokes.   Mostly you do those jokes with family close friends personally.  
Please delete the one you have on your Facebook page I would appreciate it because you sound silly you’re not taking your life circumstances seriously thank you
It’s funny it’s so you bu it’s a joke 15year olds make not your age and the problems you have.   
You should take the gift of free time and read the Bible or and socially educated books.  Go to library nog coffee shop 
Please grow up
"

I think this is just rediculous and I want to finally call her out on it. Before I do, I want to take the chance to calm down so I know I'm not over reacting and look for outside opinions from other people first. I just want to say "Its a harmless joke that my friends seem to appreciate, I'm sorry if it doesn't appeal to you. I won't delete it." and then defend myself from there if she gets mad at for saying that.

For extra context, I'm currently travelling for business and don't have access to the internet unless I go to Starbucks for free WiFi which is where I tend to spend most of my day communicating with friends, my girlfriend, and of course Reddit. 

Should I apologize and delete my post, or would I be the asshole if I doubled down and tell my mom no?