what did washington mean by when he told the americans to avoid political parties in his farewell address?

Answer 1

I think you got it wrong. He made no such reference in that address. What you may be thinking of is his warning to avoid becoming involved in European politics.

Then, the USA was insulated by an ocean from the rough & tumble of European politics. But today, we aren't as far away as we were then...

From his farewall address:
36 The great rule of conduct for us, in regard to foreign nations, is, in extending our commercial relations, to have with them as little political connexion as possible. So far as we have already formed engagements, let them be fulfilled with perfect good faith. Here let us stop.

37 Europe has a set of primary interests, which to us have none, or a very remote relation. Hence she must be engaged in frequent controversies, the causes of which are essentially foreign to our concerns. Hence, therefore, it must be unwise in us to implicate ourselves, by artificial ties, in the ordinary vicissitudes of her politics, or the ordinary combinations and collisions of her friendships or enmities.

38 Our detached and distant situation invites and enables us to pursue a different course. If we remain one people, under an efficient government, the period is not far off, when we may defy material injury from external annoyance; when we may take such an attitude as will cause the neutrality, we may at any time resolve upon, to be scrupulously respected; when belligerent nations, under the impossibility of making acquisitions upon us, will not lightly hazard the giving us provocation; when we may choose peace or war, as our interest, guided by justice, shall counsel.

Answer 2

pray hard this life is short