Sounds about right, but without a source attribution it may itself be relegated as propaganda. When will conservatives learn this? Doing there homework for them, here is a page of survey links from https://today.yougov.com, from which I find (using Google site search) this poll:
From millionaires to Muslims, small subgroups of the population seem much larger to many Americans
When people’s average perceptions of group sizes are compared to actual population estimates, an intriguing pattern emerges: Americans tend to vastly overestimate the size of minority groups. This holds for sexual minorities, including the proportion of gays and lesbians (estimate: 30%, true: 3%), bisexuals (estimate: 29%, true: 4%), and people who are transgender (estimate: 21%, true: 0.6%).
It also applies to religious minorities, such as Muslim Americans (estimate: 27%, true: 1%) and Jewish Americans (estimate: 30%, true: 2%). And we find the same sorts of overestimates for racial and ethnic minorities, such as Native Americans (estimate: 27%, true: 1%), Asian Americans (estimate: 29%, true: 6%), and Black Americans (estimate: 41%, true: 12%).
No mention of Latinos, and this this email may be using more than one poll. while WP reports, that "As of 2020, the Census Bureau estimated that there were almost 65.3 million Hispanics and Latinos living in the United States and Puerto Rico (19.5% of the overall population)."
Same source as yours:)
A recent poll was conducted by a national polling outfit, “YOUGOV.