Engage
Demand an elaborate, time-consuming comparison / analysis between your position and theirs.
Entangle
Insist that the Liberal put their posts in their own words. That will consume the most time and effort for the Liberal poster.
They will be unable to spread numerous points on numerous blogs if you have them occupied. Allowing a Liberal to post a web link is too quick and efficient for them. Tie them up. We are going for delay of game here.
Demoralize
Dismiss their narrative as rubbish immediately.
Once the Liberal goes through the trouble to research, gather, collate, compose and write their narrative your job is to discredit it.
Attack
Attack the source. Discredit Liberal sources of information whenever possible.
Confuse
Challenge the Liberal position with questions. Once you have control you can direct the narrative to where you want it to go, which is always away from letting the Liberal make their point. Conversely, do not respond to their leading questions. Don't rise to their bait.
Contain
Your job is to prevent the presentation and spread of Liberal viewpoints.
Do anything you must do to prevent a Liberal poster from presenting a well-reasoned argument or starting a civil discussion.
Don't allow a Liberal to present their dogma unchallenged EVER.