“1. if you have medical marijuana card, or found with or admit to using pot and 2. own firearms, then FEDS will send you to prison.”
You cannot cite a single example of that happening.
As a responsible firearm owner, I have been following this topic closely. Here is one example https://www.nepr.net/post/feds-pot-and-guns-dont-mix?fbclid=IwAR3COjUmSq_mNl7Tn7eAxVwRLawZ5vV9yeSBfv_SeOSnKBIkV6jiDrm-qts#stream/0