Why do conservatives treat liberals as their enemy but then they get all butt hurt when liberals treat them the same way?

For example, trump supporters and so called independents call liberals enemies of america and socialists and they have said much worse but and they expect liberals to take it but then if hillary dares to call them a basket of deplorables, everyone gets offended at her for calling them out or Joe Biden calling them a threat to the US and constitution and the rule of law.

Why do conservatives treat liberals as their enemy but then they get all butt hurt when liberals treat them the same way?
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