I think the "No True Scottsman" fallacy is confusing here. It's actually really sly. The "No True Scottsman" statement must be used as the argument. It has to

I think the "No True Scottsman" fallacy is confusing here. It's actually really sly. The "No True Scottsman" statement must be used as the argument. It has to say that they're wrong BECAUSE they are not a true Scottsman. What OP did was say there is The Left and there is "The Left". The Left is against rentiers. "The Left" supports rentiers. He's dividing the two, but he's not saying one is wrong because they're not true leftists, he's saying one is wrong because they support rentiers. But then he additionally says they're not true leftists, which is to say that a leftists shouldn't support them because they don't align, which is where the smell comes from. The main argument is not a Scottsman fallacy. But there's definitely some implied Scottsmanism in the additional use of Left and "Left", which if read by the right person who is already weak to Scottsmanism will materialize as the Scottsman fallacy. EDIT: I thought you were wrong, but under more analysis, I realized you were right, it was just complicated.