You mean the Democrats/Liberals who still have detention camps and support the genocide in Gaza?

To answer your question, what is meant by "both parties are the same" is that neither side has any interest in solving the root causes of virtually every issue within the country and abroad. Democrats and Republicans put the interests of the wealthiest and the preservation of capitalism ahead of all else. It's a bit unfair to say that everything the parties publicly fight over is a distraction from the conflict between the ultra rich and everyone else when fascism can and does create horrible outcomes for the less privileged. But it's certainly a convenience for Democrats to be able to say, "at least we're not Trump" while offering nothing else to those suffering under the constant shift to the right.