I don't think terms such as evil are helpful at all and the extreme types of rhetoric being used currently are no good for anyone. However, they are one of the parties (and others are doing it too) who are fuelling the more extreme speech being use3d.
As a party, the tories have a history (and current practice) of helping to support the better off whilst ignoring the needs, and in some cases worsening life, for the less fortunate. To name a few of the top of my head:
They have vilified and demonised disabled people, pushing a narrative of all people with disabilities of being workshy and scroungers.
Put policies in place which disproportionally affect disabled people.
Policies such as the bedroom tax, which was bought in despite there not being enough smaller properties for people to move into.
Sanctions to benefits to an extent people have died due to them. Sanctions which are too harsh to allow for a continued standard of living.
Expecting the poorest in society to wait 5 weeks for benefit claims.
Freezing the incomes of the state dependant people whilst giving tax breaks to those who are well off.
Blaming economic crash on the poorest when in fact its roots were well developed amoungst the richest institutions across the glove.
Annihilation of social care and SEND budgets.
Assessment scheme which deems people fit for work, when those people have been weeks away from death.
In summary, the tories are too focussed on ensuring their backers keep backing them while that those with less power and a smaller voice get trampled on and blamed for all of the countries problems. This leaves a horrid taste in a lot of peoples mouths and feeds resentment towards the party.