You can't take sides against anything. If you would just leave the "against" part out;

你不要参与“反对”什么的活动中去。 如果你能把所有“反对”屏除；

youdao

This will take a lot of wind out of the cases against Intel brought by regulators on both sides of the Atlantic.

这将使得许多由大西洋两岸的监管机构提出针对英特尔公司的经济案件就此沉灭。

youdao

Slaughter it and take the blood and sprinkle it against the altar on all sides.

要宰这羊，把血洒在坛的周围。

youdao

Some in Russia want the Armenians to take sides against the Georgians, perhaps by stirring up the Armenian minority there.

ECONOMIST: The Caucasus: The art of levitation | The

They will play two Tests against the Kiwis, before all three sides take part in a one-day series.

BBC: Ganguly aims to prove point