If they will accept your opinion, give it to them. If they are prepared to listen, great. If not, give them another chance or two, then give it a miss. I can't discuss with my family, (Siblings) because I am a bit mad, but my children are all in agreement with me.

Most people know there's something smelly, but they fear to break out.

My brother has an immune system deficiency and he has been quarantined for 2 months. My family is mixed on the Coronavirus. My family is fed up with the people who push an agenda with the coronavirus. But, they believe the country is doing well keeping us safe and that we should wear masks when we start going out to places. Let me know anything that could maybe educate them more on this coronavirus agenda.

I just don't understand this mask business, there is no scientific evidence that the mask really protects you from the virus and is very limited that if you're infected, whether the mask protects other people from getting infected by you, maybe unless your hacking and coughing uncontrollably and shouldn't be out in public doing that to being with. the real reason for the mask, like I've been saying and so have many other commentators, is for one thing : public and visual compliance to the system.
The mask shows we publicly acknowledge our serfdom for the upcoming nєω ωσrℓ∂ σr∂єr. there is no other reason why they are mandating the public to wear the stupid while the data and medical evidence actually shows the mask is unhealthy and accuмulates bacteria and virus and you actually are more susceptible to infecting yourself if you wear the damn thing!
Here's a decent video by a sane doctor describing what the research really shows about the stupid coffee filters the stupid politicians are mandating we put on our faces all day. Simply ridiculous. Start showing videos like  this to the brainwashed members of your family;
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Forget the mask debate, there is no virus.  Here is one of the best videos:



Here is probably the best video:

My brother has an immune system deficiency and he has been quarantined for 2 months. My family is mixed on the Coronavirus. My family is fed up with the people who push an agenda with the coronavirus. But, they believe the country is doing well keeping us safe and that we should wear masks when we start going out to places. Let me know anything that could maybe educate them more on this coronavirus agenda.

I would ask them a hypothetical but serious question: If within the next 5 days, everyone in the USA started wearing a mask with the "TRUMP 2020" logo plastered across it, how long would it take for the experts to decide that masks are now harmful, even deadly to wear and mandate that wearing masks in public is no longer allowed.