1. the suspect wasn't a Muslim (he's Mormon)
2. it wasn't ricin, it was ground up castor beans
3. the guy threatens to kill presidents and blow up military bases all the time.
Just another day in the Shining City on the Hill
NBC news article https://www.nbcnews.com/news/us-news/utah-man-charged-sending-ricin-scare-letters-trump-others-n917201
no, it's not ricin https://www.nbcnews.com/news/us-news/suspected-ricin-laced-letters-did-not-contain-finished-form-poison-n916271
threatened Putin and the Queen as well https://sputniknews.com/us/201810061068652424-us-navy-vet-ricin-scare-case/
big scare on Fox (till they found out it wasn't a Muslim) https://video.foxnews.com/v/5843541433001/?#sp=show-clips