You may need to go back to when he showed up here, when people responded to the concept of third party candidates in general, not him or their assumptions about him specifically.
After a while he made a name for himself, and people started to respond to him differently after evaluating his many interactions.
Let’s compare, for example, to mozz, who probably has a fair amount of respect for his thoughtful and comprehensive replies. Or jeffw, who also seems to want to generate traffic but appears to be much more genuine about republishing political articles of general interest.
UniversalMonk has earned some of the negative response he’s getting.