You've seen no evidence of this? Just look on here where Labour voters are referred to as everything from thick and lazy, to being communists, guilty of theft, gullible etc.
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And told to "Get a job"
Just on this site, I am shocked at the insults and infantilising assumptions made against Labour voters , up to and since the election.
Assumptions that they get their info from twitter (personally I'm not on twitter, occasionally post a relevant quote from there).
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Also, claims that Labour voters are mostly students or unemployed/scroungers ..... and that people vote Labour when they are young, but grow up, mature, gain responsibilities and so become more responsible, then they abandon Labour as a youthful folly, and vote Tory.
The arrogance and, frankly ignorance, in those insults is deeply worrying, with inaccurate stereotypes all over the place.
Why bother to source statements with evidence, research, documentation, only to have it arrogantly dismissed and be insulted for it, by Tory voters.