Should crazy people be allowed to have guns?

Guns supporters say the cause of mass shootings isn't guns, it's crazy people. So shouldn't we have laws requiring a mental health assessments of gun buyers like other countries do to keep guns away from crazy people?
https://www.newsweek.com/what-do-you-need-do-get-gun-other-developed-countries-404726
https://www.nytimes.com/interactive/2018/03/02/world/international-gun-laws.html
Should crazy people be allowed to have guns?
How can you say crazy people are the problem, then oppose laws to keep guns away from crazy people? That's...
Should crazy people be allowed to have guns?
Should crazy people be allowed to have guns?
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