Gypsies historically religiously assimilate to whatever religion is the majority. In the event that they have a Gypsy religion they would want to follow (I wouldn't know what that is) I don't think their religion prohibits them from donating their organs. Same with Native Americans.
While Gypsies do indeed assimilate to the most prominent religion in their country or region (in the United States I believe most Gypsies are Roman Catholic), that does not mean they do not all share similar beliefs unique to the Romani people. One of those beliefs is that in the afterlife, a person's spirit retraces its steps for one year, and so it is important for the physical body to be intact. [https://donatelifecalifornia.org/education/faqs/religious-views-on-organ-donation/
As far as the Native American beliefs around organ donation, it is believed in Native American tribes that organ donation is a spiritual sacrifice as well as a physical one. This is because they believe that when a person passes, the person needs to have every part of their body with them. That belief is still very strongly held on to today, however it is shown that Native American donors have begun to slightly increase. [https://www.nativetimes.com/48-life/health/8351-view-of-organ-donation-shifting-in-native-culture
The 4th amendment makes an exception for probable cause. The cause for removing one's organs could be death. There could be a law that states that makes an exception to the 4th amendment for dead people.
So you recommend amending the 4th amendment to make organ donation mandatory? Probable cause is used when an officer of the law personally witnesses a crime. Are you saying choosing not to donate your organs should be on the same level as criminal activity? I would like some clarity on this.
I think they might make your body insecure when professionals pour toxic chemicals in your body to dry it out and to make it last longer., so when you die, either way your body is screwed. The question is; do you reuse the body in order to be able to save someone else's life? Since many people don't get access to life saving organs, this would help save more lives. I would say life is more valuable then the rights of a dead person.
Not everybody gets the 'toxic chemicals' in them to dry the body out; that's actually not what happens at all when a person is prepped for a traditional funeral and burial service. The morticians and coroner speak with the family if the person does not have a written will about how they want to be buried. In the cases of traumatic or sudden deaths, an autopsy is performed and, if necessary, a special person comes in to restore the body. When the person's body arrives at the funeral home, they automatically wash and disinfect the body for the safety of everyone in the vicinity. Most often, families only choose for the body to be embalmed when they want an open casket visitation or if they are moving the body to be buried out of state or for another option that would require the body to need to be chemically preserved. Embalming is not required for immediate burial ceremonies, direct cremations, or in states that don't require embalming for a closed casket burial when refrigeration is available. [https://www.funeralwise.com/learn/prep/
] So no, you're body is not always "screwed".
A body should not be seen as some sort of recyclable object. That body used to be a breathing, living person. To deny that person, even if s/he is dead, their body should remain their body. Also, a lot of people actually get access to life-saving organs. Last year, over 35,000 (36,528 to be exact) people received a life-saving transplant--that's the highest number it's been in six years. While it doesn't seem like that's a lot of transplants, that's almost one-third of all the people on the transplant list every year! [https://www.organdonor.gov/statistics-stories/statistics.html
As far as your stance that life is more valuable than the rights of a dead person, I have to say I disagree with that opinion. I think life is priceless, no argument there, but if it was me personally, I know it would haunt me every single day if I had organs in me that were taken from someone against their will when they were at their most vulnerable, voiceless state.