I believe the term for what you just did is 'victim-blaming'. The alt-right label, for example, has fuzzy boundaries, and this is leveraged to apply that label

I believe the term for what you just did is 'victim-blaming'. The alt-right label, for example, has fuzzy boundaries, and this is leveraged to apply that label to anyone without feeling the need to verify the accused's position or statements in more detail. It could be argued that the right has similar issues around applying the label of 'communist', 'socialist', etc. The intent in these cases is to cordon the accused off, lighting a signal flare that their ideas are too extreme to be worth considering. This causes real harm to real ability to discuss things in the moderate spectrum if everyone is being labeled as being at the edges.