Islam is judged in it's results, not on it's essence
This is why saying things like “Islam is a religion of peace,” “this is not real Islam,” or “these are just bad people using Islam to do bad things” is largely unpersuasive to many non-Muslims in the West.
The reason is that many of them are not judging Islam primarily by its theology or by what Muslims say Islam ought to be. They look at the societies of Muslim-majority countries and at the outcomes they associate with them: levels of prosperity, individual freedom, women’s rights, LGBT rights, education, democracy, and so on.
From that, some draw a fairly simple conclusion: they would not want to live in, or see their families live in, societies with those characteristics.
That is not a rigorous way to determine what Islam itself causes. Muslim-majority countries differ enormously, and their outcomes are shaped by history, institutions, politics, economics, conflict, and many other factors. It is ultimately a crude and unreliable heuristic.
But perceptions matter. If Muslim-majority societies consistently performed much better across measures of human development, freedom, equality, and quality of life, I suspect arguments about Islam would encounter considerably less skepticism and hostility in the West.